8 men can complete a work in 24 days. If 12 men work at the same rate, in how many days will the work be completed? MCQ with Answer and Explanation

8 men can complete a work in 24 days. If 12 men work at the same rate, in how many days will the work be completed?

A. 18.0

B. 16.0

C. 22.0

D. 20.0

Answer: Option B

Total work = 8 × 24 = 192 man-days. Required days = 192/12 = 16.0 days.

This question belongs to: Maths Time and Work

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Question #1 Report Error

8 men can complete a work in 18 days. If 12 men work at the same rate, in how many days will the work be completed?

A. 18.0

B. 12.0

C. 14.0

D. 16.0

Correct Answer: Option B

Explanation:
Total work = 8 × 18 = 144 man-days. Required days = 144/12 = 12.0 days.

This question belongs to: Maths Time and Work

Question #2 Report Error

A can complete a work in 10 days and B can complete the same work in 25 days. If they work together, in how many days will the work be completed?

A. 7.14

B. 9.14

C. 11.14

D. 13.14

Correct Answer: Option A

Explanation:
Combined rate = 1/10 + 1/25. Time = 1 ÷ combined rate = 7.14 days.

This question belongs to: Maths Time and Work

Question #3 Report Error

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

A. 21.41

B. 11.41

C. 26.41

D. 16.41

Correct Answer: Option B

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

This question belongs to: Maths Time and Work