All Courses
Explore Courses UPSC Exam UPSC Test Series Free Notes EduRev Infinity Get the App Login Join for Free
Sign in Open App
CAT Exam  >  CAT Questions  >  There are 3 candles with their lengths in the... Start Learning for Free
SaveJoin the Discussion on the App
There are 3 candles with their lengths in the ratio 1 : 2 : 3 (Every other dimension is the same for all the candles). They are lit in such a way that when the second candle has been lit, the first candle had been reduced to half its original length & when the third candle is lit, the second candle is half its original length.The total time taken for all the candles to totally burn out is 9 hours. Assume that the candles are lit in increasing order lengths. In how much time does the longest candle completely burn?
  • a)
    2 hours
  • b)
    6 hours
  • c)
    4 hours
  • d)
    Cannot be determined.
Correct answer is option 'B'. Can you explain this answer?
FREE This question is part of
Download PDF Attempt Test
Download PDF Attempt this Test
Verified Answer
There are 3 candles with their lengths in the ratio 1 : 2 : 3 (Every o...
Since, apart from length, all the dimensions of the candle are the same, the time taken by the candles to burn is in the ratio of the lengths of the candles i.e. 1 : 2 : 3.
Let the shortest candle take 2x hours to burn. So, the second longest candle and longest candle respectively take 4x and 6x hours to burn.
Now, the second candle is lit after the first candle is reduced to half its length.
Since the first candle burns completely in 2x hours, it becomes half in x hours.
Thus, the second candle is lit after x hours.
Similarly, the third candle is lit after the second candle is reduced to half its length.
Since the second candle burns completely in 4x hours, it becomes half in 2x hours.
So, the second candle burns for 2x hours, after which the third candle is lit.
Once the third candle is lit, it takes 6x hours to burn.
All three candles burn out in 9 hours.
x + 2x + 6x = 9
 x = 1.
Therefore, the time taken by the longest candle to burn fully is 6 hours.
Hence, option 2.
View all questions of this test
Most Upvoted Answer
There are 3 candles with their lengths in the ratio 1 : 2 : 3 (Every o...
Let's assume that the original lengths of the candles are x, 2x, and 3x respectively.

1. Understanding the Burning Process:
- When the second candle is lit, the first candle has been reduced to half its original length.
- When the third candle is lit, the second candle is reduced to half its original length.

2. Calculating the Burning Time:
- Let's say it takes t hours for the longest candle to burn completely.
- In t hours, the first candle would have burned for t/2 hours, as it burns at half the rate of the longest candle.
- Similarly, the second candle would have burned for t/4 hours.
- Since the total burning time of all the candles is 9 hours, we can write the equation: t + t/2 + t/4 = 9.

3. Solving the Equation:
- To solve the equation, we can multiply through by 4 to eliminate the fractions: 4t + 2t + t = 36.
- Simplifying, we get: 7t = 36.
- Dividing both sides by 7, we find that t = 36/7.

4. Finding the Burning Time of the Longest Candle:
- The burning time of the longest candle is t = 36/7 hours.

Therefore, the longest candle completely burns in approximately 5.14 hours, which is closest to 6 hours (option B).
Attention CAT Students!
To make sure you are not studying endlessly, EduRev has designed CAT study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in CAT.
< Previous Question Next Question >
Explore Courses for CAT exam

Similar CAT Doubts

Read the passages carefully and answer the questions that follow :Time has many dimensions, is a concept often advanced to account for certain inexplicable happenings. The gist of the idea is that time - which seems to unfold in a linear way, with the past coming before the present and the present before the future - might, in another dimension, not be experienced sequentially. The past, present and future could exist simultaneously.The concept that there are unfamiliar dimensions of time is most easily approached by way of those dimensions with which we are already familiar, those of length, height and breadth. These, in turn, are best approached, quite literally, from a starting point, which, geometrically speaking, has a location but no dimensions. It does, however, relate to figures with dimensions in the following way: If a point is moved through space, it marks a line, with the one dimension of length. If a line is moved through space, it traces the figure of a plane with the two dimensions of length and breadth. And, if a plane is moved in space, it traces a figure with the three dimensions of length, breadth and height.We can also work backward to form a three-dimensional body and find that the cross section of the three-dimensional cube is a two-dimensional plane, the cross section of the two-dimensional plane is a one-dimensional line and that the cross section of the line is a dimensionless point. From this, we can infer that a body of three dimensions is the cross section of a body, when moved in a certain way, of four dimensions. Then comes the question, of what sort of body could a three-dimensional shape be the cross section? And, in what sort of new direction could a three-dimensional shape be moved to produce one of four dimensions, since a movement other than up and down, backward and forward or side to side would simply produce a larger figure, not one of a different dimension. The answer, of course, is the feature duration. For, as soon as something ceases to endure, it ceases to exit. To the three familiar dimensions, then, we should add duration in time as a fourth dimension. Ordinary, three-dimensional bodies should, therefore, be properly described as having only length, breadth and height but no duration. Is such a thing possible? It is, but only hypothetically. For in fact, the point, line and plane do not truly exist as such. Any line that can be seen has breadth as well as length (and duration), just as any physical plane has a certain thickness as well as length and breadth. What movement, then, must a figure of three dimensions undergo to produce a body of four dimensions?We moved a plane in the dimension of height to produce a cube, so the movement of a (hypothetical) cube in the dimension of time should produce a (real) figure of four dimensions. What does movement in the dimension of time mean? As we said, it must mean movement in a new direction, not up, down or sideways. Are there any other kinds of movement? For a start, there is the movement that the Earths rotation imparts to everything upon it and that puts even apparently motionless bodies in motion. Thus, we may say that the cross section of a real body, whose fourth dimension is duration, is inseparable from the motion that the turning world inevitably imparts to everything. Further, inevitable motions are that of the Earth around the Sun, of the Sun around the centre of the galaxy, and, perhaps, of the galaxy itself around some unknown point. Since any perceptible body is, in fact, undergoing all these motions simultaneously, we can say that it is ordinarily imperceptible. Because, motions and the dimensions, they imply, are only perceptible in a framework of time, they can be referred to as dimensions of time.If duration is one aspect of time, what might the others be? Among several possibilities, we can suggest appearance and disappearance, change and recurrence. Of all possibilities, only duration is perceptible. When we say that something is perceptible, we mean that we suddenly note its existence, when something disappears we note its lack of existence. We perceive no intermediate condition of appearing or disappearing. In the same way, we talk of change, but actually only develop the concept, as we perceive aggregates of characteristics that exist or cease to exist. And so we infer, but do not observe, the recurrence of sunset and sunrise, the passage of seasons, the growth of a child. And yet, things really do appear and disappear, change and recur, although not actually perceived to do so. They are, so to speak, hypothetical to us and must have their reality in other dimensions of time, just as the hypothetical three-dimensional body becomes real, that is, perceptible, in the dimension of time we call duration.If access to higher dimensions of time belongs to one body, it is at least theoretically possible that it belongs, though invisibly, to all bodies. We can further assume that such access is by way of unfamiliar modes or levels of consciousness – and that the name we give to one of these is prophecy.Q. The author mainly agrees with the idea that

Read the passages carefully and answer the questions that follow : Time has many dimensions, is a concept often advanced to account for certain inexplicable happenings. The gist of the idea is that time - which seems to unfold in a linear way, with the past coming before the present and the present before the future - might, in another dimension, not be experienced sequentially. The past, present and future could exist simultaneously. The concept that there are unfamiliar dimensions of time is most easily approached by way of those dimensions with which we are already familiar, those of length, height and breadth. These, in turn, are best approached, quite literally, from a starting point, which, geometrically speaking, has a location but no dimensions. It does, however, relate to figures with dimensions in the following way: If a point is moved through space, it marks a line, with the one dimension of length. If a line is moved through space, it traces the figure of a plane with the two dimensions of length and breadth. And, if a plane is moved in space, it traces a figure with the three dimensions of length, breadth and height. We can also work backward to form a three-dimensional body and find that the cross section of the three-dimensional cube is a two-dimensional plane, the cross section of the two-dimensional plane is a one-dimensional line and that the cross section of the line is a dimensionless point. From this, we can infer that a body of three dimensions is the cross section of a body, when moved in a certain way, of four dimensions. Then comes the question, of what sort of body could a three-dimensional shape be the cross section? And, in what sort of new direction could a three-dimensional shape be moved to produce one of four dimensions, since a movement other than up and down, backward and forward or side to side would simply produce a larger figure, not one of a different dimension. The answer, of course, is the feature duration. For, as soon as something ceases to endure, it ceases to exit. To the three familiar dimensions, then, we should add duration in time as a fourth dimension. Ordinary, three-dimensional bodies should, therefore, be properly described as having only length, breadth and height but no duration. Is such a thing possible? It is, but only hypothetically. For in fact, the point, line and plane do not truly exist as such. Any line that can be seen has breadth as well as length (and duration), just as any physical plane has a certain thickness as well as length and breadth. What movement, then, must a figure of three dimensions undergo to produce a body of four dimensions? We moved a plane in the dimension of height to produce a cube, so the movement of a (hypothetical) cube in the dimension of time should produce a (real) figure of four dimensions. What does movement in the dimension of time mean? As we said, it must mean movement in a new direction, not up, down or sideways. Are there any other kinds of movement? For a start, there is the movement that the Earths rotation imparts to everything upon it and that puts even apparently motionless bodies in motion. Thus, we may say that the cross section of a real body, whose fourth dimension is duration, is inseparable from the motion that the turning world inevitably imparts to everything. Further, inevitable motions are that of the Earth around the Sun, of the Sun around the centre of the galaxy, and, perhaps, of the galaxy itself around some unknown point. Since any perceptible body is, in fact, undergoing all these motions simultaneously, we can say that it is ordinarily imperceptible. Because, motions and the dimensions, they imply, are only perceptible in a framework of time, they can be referred to as dimensions of time. If duration is one aspect of time, what might the others be? Among several possibilities, we can suggest appearance and disappearance, change and recurrence. Of all possibilities, only duration is perceptible. When we say that something is perceptible, we mean that we suddenly note its existence, when something disappears we note its lack of existence. We perceive no intermediate condition of appearing or disappearing. In the same way, we talk of change, but actually only develop the concept, as we perceive aggregates of characteristics that exist or cease to exist. And so we infer, but do not observe, the recurrence of sunset and sunrise, the passage of seasons, the growth of a child. And yet, things really do appear and disappear, change and recur, although not actually perceived to do so. They are, so to speak, hypothetical to us and must have their reality in other dimensions of time, just as the hypothetical three-dimensional body becomes real, that is, perceptible, in the dimension of time we call duration. If access to higher dimensions of time belongs to one body, it is at least theoretically possible that it belongs, though invisibly, to all bodies. We can further assume that such access is by way of unfamiliar modes or levels of consciousness – and that the name we give to one of these is prophecy. Q. To understand the dimensions of time, we have to

Read the passages carefully and answer the questions that follow :Time has many dimensions, is a concept often advanced to account for certain inexplicable happenings. The gist of the idea is that time - which seems to unfold in a linear way, with the past coming before the present and the present before the future - might, in another dimension, not be experienced sequentially. The past, present and future could exist simultaneously.The concept that there are unfamiliar dimensions of time is most easily approached by way of those dimensions with which we are already familiar, those of length, height and breadth. These, in turn, are best approached, quite literally, from a starting point, which, geometrically speaking, has a location but no dimensions. It does, however, relate to figures with dimensions in the following way: If a point is moved through space, it marks a line, with the one dimension of length. If a line is moved through space, it traces the figure of a plane with the two dimensions of length and breadth. And, if a plane is moved in space, it traces a figure with the three dimensions of length, breadth and height.We can also work backward to form a three-dimensional body and find that the cross section of the three-dimensional cube is a two-dimensional plane, the cross section of the two-dimensional plane is a one-dimensional line and that the cross section of the line is a dimensionless point. From this, we can infer that a body of three dimensions is the cross section of a body, when moved in a certain way, of four dimensions. Then comes the question, of what sort of body could a three-dimensional shape be the cross section? And, in what sort of new direction could a three-dimensional shape be moved to produce one of four dimensions, since a movement other than up and down, backward and forward or side to side would simply produce a larger figure, not one of a different dimension. The answer, of course, is the feature duration. For, as soon as something ceases to endure, it ceases to exit. To the three familiar dimensions, then, we should add duration in time as a fourth dimension. Ordinary, three-dimensional bodies should, therefore, be properly described as having only length, breadth and height but no duration. Is such a thing possible? It is, but only hypothetically. For in fact, the point, line and plane do not truly exist as such. Any line that can be seen has breadth as well as length (and duration), just as any physical plane has a certain thickness as well as length and breadth. What movement, then, must a figure of three dimensions undergo to produce a body of four dimensions?We moved a plane in the dimension of height to produce a cube, so the movement of a (hypothetical) cube in the dimension of time should produce a (real) figure of four dimensions. What does movement in the dimension of time mean? As we said, it must mean movement in a new direction, not up, down or sideways. Are there any other kinds of movement? For a start, there is the movement that the Earths rotation imparts to everything upon it and that puts even apparently motionless bodies in motion. Thus, we may say that the cross section of a real body, whose fourth dimension is duration, is inseparable from the motion that the turning world inevitably imparts to everything. Further, inevitable motions are that of the Earth around the Sun, of the Sun around the centre of the galaxy, and, perhaps, of the galaxy itself around some unknown point. Since any perceptible body is, in fact, undergoing all these motions simultaneously, we can say that it is ordinarily imperceptible. Because, motions and the dimensions, they imply, are only perceptible in a framework of time, they can be referred to as dimensions of time.If duration is one aspect of time, what might the others be? Among several possibilities, we can suggest appearance and disappearance, change and recurrence. Of all possibilities, only duration is perceptible. When we say that something is perceptible, we mean that we suddenly note its existence, when something disappears we note its lack of existence. We perceive no intermediate condition of appearing or disappearing. In the same way, we talk of change, but actually only develop the concept, as we perceive aggregates of characteristics that exist or cease to exist. And so we infer, but do not observe, the recurrence of sunset and sunrise, the passage of seasons, the growth of a child. And yet, things really do appear and disappear, change and recur, although not actually perceived to do so. They are, so to speak, hypothetical to us and must have their reality in other dimensions of time, just as the hypothetical three-dimensional body becomes real, that is, perceptible, in the dimension of time we call duration.If access to higher dimensions of time belongs to one body, it is at least theoretically possible that it belongs, though invisibly, to all bodies. We can further assume that such access is by way of unfamiliar modes or levels of consciousness – and that the name we give to one of these is prophecy.Q. In the passage, the author has

Read the passages carefully and answer the questions that follow :Time has many dimensions, is a concept often advanced to account for certain inexplicable happenings. The gist of the idea is that time - which seems to unfold in a linear way, with the past coming before the present and the present before the future - might, in another dimension, not be experienced sequentially. The past, present and future could exist simultaneously.The concept that there are unfamiliar dimensions of time is most easily approached by way of those dimensions with which we are already familiar, those of length, height and breadth. These, in turn, are best approached, quite literally, from a starting point, which, geometrically speaking, has a location but no dimensions. It does, however, relate to figures with dimensions in the following way: If a point is moved through space, it marks a line, with the one dimension of length. If a line is moved through space, it traces the figure of a plane with the two dimensions of length and breadth. And, if a plane is moved in space, it traces a figure with the three dimensions of length, breadth and height.We can also work backward to form a three-dimensional body and find that the cross section of the three-dimensional cube is a two-dimensional plane, the cross section of the two-dimensional plane is a one-dimensional line and that the cross section of the line is a dimensionless point. From this, we can infer that a body of three dimensions is the cross section of a body, when moved in a certain way, of four dimensions. Then comes the question, of what sort of body could a three-dimensional shape be the cross section? And, in what sort of new direction could a three-dimensional shape be moved to produce one of four dimensions, since a movement other than up and down, backward and forward or side to side would simply produce a larger figure, not one of a different dimension. The answer, of course, is the feature duration. For, as soon as something ceases to endure, it ceases to exit. To the three familiar dimensions, then, we should add duration in time as a fourth dimension. Ordinary, three-dimensional bodies should, therefore, be properly described as having only length, breadth and height but no duration. Is such a thing possible? It is, but only hypothetically. For in fact, the point, line and plane do not truly exist as such. Any line that can be seen has breadth as well as length (and duration), just as any physical plane has a certain thickness as well as length and breadth. What movement, then, must a figure of three dimensions undergo to produce a body of four dimensions?We moved a plane in the dimension of height to produce a cube, so the movement of a (hypothetical) cube in the dimension of time should produce a (real) figure of four dimensions. What does movement in the dimension of time mean? As we said, it must mean movement in a new direction, not up, down or sideways. Are there any other kinds of movement? For a start, there is the movement that the Earths rotation imparts to everything upon it and that puts even apparently motionless bodies in motion. Thus, we may say that the cross section of a real body, whose fourth dimension is duration, is inseparable from the motion that the turning world inevitably imparts to everything. Further, inevitable motions are that of the Earth around the Sun, of the Sun around the centre of the galaxy, and, perhaps, of the galaxy itself around some unknown point. Since any perceptible body is, in fact, undergoing all these motions simultaneously, we can say that it is ordinarily imperceptible. Because, motions and the dimensions, they imply, are only perceptible in a framework of time, they can be referred to as dimensions of time.If duration is one aspect of time, what might the others be? Among several possibilities, we can suggest appearance and disappearance, change and recurrence. Of all possibilities, only duration is perceptible. When we say that something is perceptible, we mean that we suddenly note its existence, when something disappears we note its lack of existence. We perceive no intermediate condition of appearing or disappearing. In the same way, we talk of change, but actually only develop the concept, as we perceive aggregates of characteristics that exist or cease to exist. And so we infer, but do not observe, the recurrence of sunset and sunrise, the passage of seasons, the growth of a child. And yet, things really do appear and disappear, change and recur, although not actually perceived to do so. They are, so to speak, hypothetical to us and must have their reality in other dimensions of time, just as the hypothetical three-dimensional body becomes real, that is, perceptible, in the dimension of time we call duration.If access to higher dimensions of time belongs to one body, it is at least theoretically possible that it belongs, though invisibly, to all bodies. We can further assume that such access is by way of unfamiliar modes or levels of consciousness – and that the name we give to one of these is prophecy.Q. As per the passage, it is not possible to have a true line.

Top Courses for CATView all

Top Courses for CAT

There are 3 candles with their lengths in the ratio 1 : 2 : 3 (Every other dimension is the same for all the candles). They are lit in such a way that when the second candle has been lit, the first candle had been reduced to half its original length when the third candle is lit, the second candle is half its original length.The total time taken for all the candles to totally burn out is 9 hours. Assume that the candles are lit in increasing order lengths. In how much time does the longest candle completely burn?a)2 hoursb)6 hoursc)4 hoursd)Cannot be determined.Correct answer is option 'B'. Can you explain this answer?
Question Description
There are 3 candles with their lengths in the ratio 1 : 2 : 3 (Every other dimension is the same for all the candles). They are lit in such a way that when the second candle has been lit, the first candle had been reduced to half its original length when the third candle is lit, the second candle is half its original length.The total time taken for all the candles to totally burn out is 9 hours. Assume that the candles are lit in increasing order lengths. In how much time does the longest candle completely burn?a)2 hoursb)6 hoursc)4 hoursd)Cannot be determined.Correct answer is option 'B'. Can you explain this answer? for CAT 2024 is part of CAT preparation. The Question and answers have been prepared according to the CAT exam syllabus. Information about There are 3 candles with their lengths in the ratio 1 : 2 : 3 (Every other dimension is the same for all the candles). They are lit in such a way that when the second candle has been lit, the first candle had been reduced to half its original length when the third candle is lit, the second candle is half its original length.The total time taken for all the candles to totally burn out is 9 hours. Assume that the candles are lit in increasing order lengths. In how much time does the longest candle completely burn?a)2 hoursb)6 hoursc)4 hoursd)Cannot be determined.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for CAT 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for There are 3 candles with their lengths in the ratio 1 : 2 : 3 (Every other dimension is the same for all the candles). They are lit in such a way that when the second candle has been lit, the first candle had been reduced to half its original length when the third candle is lit, the second candle is half its original length.The total time taken for all the candles to totally burn out is 9 hours. Assume that the candles are lit in increasing order lengths. In how much time does the longest candle completely burn?a)2 hoursb)6 hoursc)4 hoursd)Cannot be determined.Correct answer is option 'B'. Can you explain this answer?.
Solutions for There are 3 candles with their lengths in the ratio 1 : 2 : 3 (Every other dimension is the same for all the candles). They are lit in such a way that when the second candle has been lit, the first candle had been reduced to half its original length when the third candle is lit, the second candle is half its original length.The total time taken for all the candles to totally burn out is 9 hours. Assume that the candles are lit in increasing order lengths. In how much time does the longest candle completely burn?a)2 hoursb)6 hoursc)4 hoursd)Cannot be determined.Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for CAT. Download more important topics, notes, lectures and mock test series for CAT Exam by signing up for free.
Here you can find the meaning of There are 3 candles with their lengths in the ratio 1 : 2 : 3 (Every other dimension is the same for all the candles). They are lit in such a way that when the second candle has been lit, the first candle had been reduced to half its original length when the third candle is lit, the second candle is half its original length.The total time taken for all the candles to totally burn out is 9 hours. Assume that the candles are lit in increasing order lengths. In how much time does the longest candle completely burn?a)2 hoursb)6 hoursc)4 hoursd)Cannot be determined.Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of There are 3 candles with their lengths in the ratio 1 : 2 : 3 (Every other dimension is the same for all the candles). They are lit in such a way that when the second candle has been lit, the first candle had been reduced to half its original length when the third candle is lit, the second candle is half its original length.The total time taken for all the candles to totally burn out is 9 hours. Assume that the candles are lit in increasing order lengths. In how much time does the longest candle completely burn?a)2 hoursb)6 hoursc)4 hoursd)Cannot be determined.Correct answer is option 'B'. Can you explain this answer?, a detailed solution for There are 3 candles with their lengths in the ratio 1 : 2 : 3 (Every other dimension is the same for all the candles). They are lit in such a way that when the second candle has been lit, the first candle had been reduced to half its original length when the third candle is lit, the second candle is half its original length.The total time taken for all the candles to totally burn out is 9 hours. Assume that the candles are lit in increasing order lengths. In how much time does the longest candle completely burn?a)2 hoursb)6 hoursc)4 hoursd)Cannot be determined.Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of There are 3 candles with their lengths in the ratio 1 : 2 : 3 (Every other dimension is the same for all the candles). They are lit in such a way that when the second candle has been lit, the first candle had been reduced to half its original length when the third candle is lit, the second candle is half its original length.The total time taken for all the candles to totally burn out is 9 hours. Assume that the candles are lit in increasing order lengths. In how much time does the longest candle completely burn?a)2 hoursb)6 hoursc)4 hoursd)Cannot be determined.Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice There are 3 candles with their lengths in the ratio 1 : 2 : 3 (Every other dimension is the same for all the candles). They are lit in such a way that when the second candle has been lit, the first candle had been reduced to half its original length when the third candle is lit, the second candle is half its original length.The total time taken for all the candles to totally burn out is 9 hours. Assume that the candles are lit in increasing order lengths. In how much time does the longest candle completely burn?a)2 hoursb)6 hoursc)4 hoursd)Cannot be determined.Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice CAT tests.
Explore Courses for CAT exam

Top Courses for CAT

Explore Courses

Suggested Free Tests

Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev
Get App
© EduRev
Education Revolution
Signup to see your scores go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup