Class 7 Exam > Class 7 Questions > What is the cost of painting the two adjacent...
Start Learning for Free
What is the cost of painting the two adjacent walls of a hall at Rs 5 per m2, which has no windows or doors?
I. The area of the hall is 24 sq. m.
II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.
III. Area of one wall is 30 sq. m.
I. The area of the hall is 24 sq. m.
II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.
III. Area of one wall is 30 sq. m.
- a)I only
- b)II only
- c)III only
- d)Either I or III
Correct answer is option 'C'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
What is the cost of painting the two adjacent walls of a hall at Rs 5 ...
From II, let l = 4x, b = 6x; and h = 5x.
Then, area of the hall = (24x2) m2.
From I. Area of the hall = 24 m2.
From II and I, we get 24x2 = 24 x = 1.
∴ l = 4 m, b = 6 and h = 5 m.
Thus, the area of two adjacent walls
= [(l × h) + (b × h)] m2 can be found out and so the cost of painting two adjacent walls may be found out.
Thus, III is redundant.
∴ Correct answer is (c).
Then, area of the hall = (24x2) m2.
From I. Area of the hall = 24 m2.
From II and I, we get 24x2 = 24 x = 1.
∴ l = 4 m, b = 6 and h = 5 m.
Thus, the area of two adjacent walls
= [(l × h) + (b × h)] m2 can be found out and so the cost of painting two adjacent walls may be found out.
Thus, III is redundant.
∴ Correct answer is (c).
Most Upvoted Answer
What is the cost of painting the two adjacent walls of a hall at Rs 5 ...
To find the cost of painting the two adjacent walls of a hall, we need to know the area of the walls.
Statement I: The area of the hall is 24 sq. m.
Statement II: The breadth, length, and height of the hall are in the ratio of 4:6:5 respectively.
Statement III: The area of one wall is 30 sq. m.
Let's analyze each statement to see which ones are necessary to solve the problem.
Statement I alone is not sufficient to find the area of the walls or the cost of painting. We need more information about the dimensions of the hall.
Statement II alone provides the ratio of the dimensions but does not give any specific values. Therefore, it is not sufficient to find the area of the walls or the cost of painting.
Statement III alone tells us the area of one wall, which is 30 sq. m. Since there are two adjacent walls, the total area of the walls would be 2 times 30 sq. m, which is 60 sq. m. With this information, we can calculate the cost of painting the walls.
Now, let's consider the combination of statements.
Statements II and III together give us the ratio of the dimensions and the area of one wall. Using these, we can find the dimensions of the hall and the total area of the walls. This would allow us to calculate the cost of painting.
However, Statement I is not necessary in this case. It does not provide any additional information that is not already given in Statements II and III.
Therefore, the answer is option C - Statement III alone is sufficient to answer the question.
Statement I: The area of the hall is 24 sq. m.
Statement II: The breadth, length, and height of the hall are in the ratio of 4:6:5 respectively.
Statement III: The area of one wall is 30 sq. m.
Let's analyze each statement to see which ones are necessary to solve the problem.
Statement I alone is not sufficient to find the area of the walls or the cost of painting. We need more information about the dimensions of the hall.
Statement II alone provides the ratio of the dimensions but does not give any specific values. Therefore, it is not sufficient to find the area of the walls or the cost of painting.
Statement III alone tells us the area of one wall, which is 30 sq. m. Since there are two adjacent walls, the total area of the walls would be 2 times 30 sq. m, which is 60 sq. m. With this information, we can calculate the cost of painting the walls.
Now, let's consider the combination of statements.
Statements II and III together give us the ratio of the dimensions and the area of one wall. Using these, we can find the dimensions of the hall and the total area of the walls. This would allow us to calculate the cost of painting.
However, Statement I is not necessary in this case. It does not provide any additional information that is not already given in Statements II and III.
Therefore, the answer is option C - Statement III alone is sufficient to answer the question.
Attention Class 7 Students!
To make sure you are not studying endlessly, EduRev has designed Class 7 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 7.
|
Explore Courses for Class 7 exam
|
|
Similar Class 7 Doubts
Top Courses for Class 7View all
What is the cost of painting the two adjacent walls of a hall at Rs 5 per m2, which has no windows or doors?I. The area of the hall is 24 sq. m.II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.III. Area of one wall is 30 sq. m.a)I onlyb)II onlyc)III onlyd)Either I or IIICorrect answer is option 'C'. Can you explain this answer?
Question Description
What is the cost of painting the two adjacent walls of a hall at Rs 5 per m2, which has no windows or doors?I. The area of the hall is 24 sq. m.II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.III. Area of one wall is 30 sq. m.a)I onlyb)II onlyc)III onlyd)Either I or IIICorrect answer is option 'C'. Can you explain this answer? for Class 7 2024 is part of Class 7 preparation. The Question and answers have been prepared according to the Class 7 exam syllabus. Information about What is the cost of painting the two adjacent walls of a hall at Rs 5 per m2, which has no windows or doors?I. The area of the hall is 24 sq. m.II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.III. Area of one wall is 30 sq. m.a)I onlyb)II onlyc)III onlyd)Either I or IIICorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 7 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is the cost of painting the two adjacent walls of a hall at Rs 5 per m2, which has no windows or doors?I. The area of the hall is 24 sq. m.II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.III. Area of one wall is 30 sq. m.a)I onlyb)II onlyc)III onlyd)Either I or IIICorrect answer is option 'C'. Can you explain this answer?.
What is the cost of painting the two adjacent walls of a hall at Rs 5 per m2, which has no windows or doors?I. The area of the hall is 24 sq. m.II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.III. Area of one wall is 30 sq. m.a)I onlyb)II onlyc)III onlyd)Either I or IIICorrect answer is option 'C'. Can you explain this answer? for Class 7 2024 is part of Class 7 preparation. The Question and answers have been prepared according to the Class 7 exam syllabus. Information about What is the cost of painting the two adjacent walls of a hall at Rs 5 per m2, which has no windows or doors?I. The area of the hall is 24 sq. m.II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.III. Area of one wall is 30 sq. m.a)I onlyb)II onlyc)III onlyd)Either I or IIICorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 7 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is the cost of painting the two adjacent walls of a hall at Rs 5 per m2, which has no windows or doors?I. The area of the hall is 24 sq. m.II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.III. Area of one wall is 30 sq. m.a)I onlyb)II onlyc)III onlyd)Either I or IIICorrect answer is option 'C'. Can you explain this answer?.
Solutions for What is the cost of painting the two adjacent walls of a hall at Rs 5 per m2, which has no windows or doors?I. The area of the hall is 24 sq. m.II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.III. Area of one wall is 30 sq. m.a)I onlyb)II onlyc)III onlyd)Either I or IIICorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 7.
Download more important topics, notes, lectures and mock test series for Class 7 Exam by signing up for free.
Here you can find the meaning of What is the cost of painting the two adjacent walls of a hall at Rs 5 per m2, which has no windows or doors?I. The area of the hall is 24 sq. m.II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.III. Area of one wall is 30 sq. m.a)I onlyb)II onlyc)III onlyd)Either I or IIICorrect answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
What is the cost of painting the two adjacent walls of a hall at Rs 5 per m2, which has no windows or doors?I. The area of the hall is 24 sq. m.II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.III. Area of one wall is 30 sq. m.a)I onlyb)II onlyc)III onlyd)Either I or IIICorrect answer is option 'C'. Can you explain this answer?, a detailed solution for What is the cost of painting the two adjacent walls of a hall at Rs 5 per m2, which has no windows or doors?I. The area of the hall is 24 sq. m.II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.III. Area of one wall is 30 sq. m.a)I onlyb)II onlyc)III onlyd)Either I or IIICorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of What is the cost of painting the two adjacent walls of a hall at Rs 5 per m2, which has no windows or doors?I. The area of the hall is 24 sq. m.II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.III. Area of one wall is 30 sq. m.a)I onlyb)II onlyc)III onlyd)Either I or IIICorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice What is the cost of painting the two adjacent walls of a hall at Rs 5 per m2, which has no windows or doors?I. The area of the hall is 24 sq. m.II. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively.III. Area of one wall is 30 sq. m.a)I onlyb)II onlyc)III onlyd)Either I or IIICorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice Class 7 tests.
|
|
Explore Courses for Class 7 exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© 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