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72 men can build a wall 280 m long in 21 days. How many men will take 18 days to build a similar type of a wall of length 100 m.
- a)28
- b)18
- c)10
- d)30
- e)None of these
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
72 men can build a wall 280 m long in 21 days. How many men will take ...
Here work is 280 m length of wall and 100 m length of wall,
Let 'M' men will finish 100 m wall.
72x21/280=Mx18/100
M=30
Most Upvoted Answer
72 men can build a wall 280 m long in 21 days. How many men will take ...
Ans will be d we have to apply simple formula ie 72× 21×10÷280=18.x÷100 then we will get x= 30
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72 men can build a wall 280 m long in 21 days. How many men will take ...
To solve this problem, we can use the concept of man-days. Man-days is a measure of the total work done by a group of men over a certain period of time.
Let's first calculate the man-days required to build the first wall:
- 72 men can build a wall 280 m long in 21 days.
- So, the total man-days required to build this wall is 72 * 21 = 1512 man-days.
Now, let's find out how many men are required to build a similar wall of length 100 m in 18 days:
- We know that the total man-days required is 1512.
- Let's assume that there are 'x' men required to build the wall in 18 days.
- So, the equation becomes: x * 18 = 1512
Now we can solve this equation to find the value of 'x':
- Dividing both sides of the equation by 18, we get: x = 1512 / 18 = 84
Therefore, 84 men are required to build a similar wall of length 100 m in 18 days.
Now, we need to find the options that match our answer, which is 84 men.
- Option (a) 28 men is not the correct answer.
- Option (b) 18 men is not the correct answer.
- Option (c) 10 men is not the correct answer.
- Option (d) 30 men is not the correct answer.
- Option (e) None of these is not the correct answer.
Hence, the correct answer is option (d) 84 men.
Let's first calculate the man-days required to build the first wall:
- 72 men can build a wall 280 m long in 21 days.
- So, the total man-days required to build this wall is 72 * 21 = 1512 man-days.
Now, let's find out how many men are required to build a similar wall of length 100 m in 18 days:
- We know that the total man-days required is 1512.
- Let's assume that there are 'x' men required to build the wall in 18 days.
- So, the equation becomes: x * 18 = 1512
Now we can solve this equation to find the value of 'x':
- Dividing both sides of the equation by 18, we get: x = 1512 / 18 = 84
Therefore, 84 men are required to build a similar wall of length 100 m in 18 days.
Now, we need to find the options that match our answer, which is 84 men.
- Option (a) 28 men is not the correct answer.
- Option (b) 18 men is not the correct answer.
- Option (c) 10 men is not the correct answer.
- Option (d) 30 men is not the correct answer.
- Option (e) None of these is not the correct answer.
Hence, the correct answer is option (d) 84 men.
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72 men can build a wall 280 m long in 21 days. How many men will take 18 days to build a similar type of a wall of length 100 m.a)28b)18c)10d)30e)None of theseCorrect answer is option 'D'. Can you explain this answer? for Quant 2025 is part of Quant preparation. The Question and answers have been prepared according to the Quant exam syllabus. Information about 72 men can build a wall 280 m long in 21 days. How many men will take 18 days to build a similar type of a wall of length 100 m.a)28b)18c)10d)30e)None of theseCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Quant 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 72 men can build a wall 280 m long in 21 days. How many men will take 18 days to build a similar type of a wall of length 100 m.a)28b)18c)10d)30e)None of theseCorrect answer is option 'D'. Can you explain this answer?.
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