If 20 men can build a wall 56 meters long in 6 days, what length of a similar wall can be built by 35 men in 3 days? MCQ with Answer and Explanation

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If 20 men can build a wall 56 meters long in 6 days, what length of a similar wall can be built by 35 men in 3 days?

A. 56 meters

B. 42 meters

C. 49 meters

D. 52 meters

Answer: Option C

Solution (By JKSSB Mock Tests)

Using (M1 * D1) / W1 = (M2 * D2) / W2: (20 * 6) / 56 = (35 * 3) / W2 => 120 / 56 = 105 / W2 => W2 = (105 * 56) / 120 = (7 * 56) / 8 = 7 * 7 = 49 meters.

This question belongs to: Maths Time and Work

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Question #1

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A can complete a work in 18 days and B can complete the same work in 28 days. If they work together, in how many days will the work be completed?

A. 14.96

B. 12.96

C. 10.96

D. 16.96

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Correct Answer: Option C

Explanation:
Combined rate = 1/18 + 1/28. Time = 1 ÷ combined rate = 10.96 days.

This question belongs to: Maths Time and Work

Question #2

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A can complete a work in 18 days and B can complete the same work in 18 days. If they work together, in how many days will the work be completed?

A. 13.0

B. 9.0

C. 11.0

D. 15.0

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Correct Answer: Option B

Explanation:
Combined rate = 1/18 + 1/18. Time = 1 ÷ combined rate = 9.0 days.

This question belongs to: Maths Time and Work

Question #3

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A can complete a work in 21 days and B in 25 days. If they work together, the work will be completed in:

A. 11.41

B. 21.41

C. 16.41

D. 26.41

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Correct Answer: Option A

Explanation:
Combined rate = 1/21 + 1/25. Required time = 11.41 days.

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