15 men can complete a work in 23 days. If 23 men work at the same rate, how many days are required? MCQ with Answer and Explanation

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15 men can complete a work in 23 days. If 23 men work at the same rate, how many days are required?

A. 20.0

B. 15.0

C. 22.5

D. 17.5

Answer: Option B

Solution (By JKSSB Mock Tests)

Total work = 345 man-days. Days = 15.0.

This question belongs to: Maths Time and Work

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Question #1

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

A. 17.5

B. 20.0

C. 12.5

D. 15.0

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Correct Answer: Option C

Explanation:
Combined rate = 1/25 + 1/25. Time = 12.5 days.

This question belongs to: Maths Time and Work

Question #2

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A can complete a work in 16 days and B in 20 days. If both work together, in how many days will the work be completed?

A. 13.89

B. 8.89

C. 11.39

D. 16.39

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Correct Answer: Option B

Explanation:
Combined rate = 1/16 + 1/20. Time = 8.89 days.

This question belongs to: Maths Time and Work

Question #3

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A can complete a work in 9 days and B in 13 days. If they work together, the work will be completed in:

A. 10.32

B. 15.32

C. 20.32

D. 5.32

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Correct Answer: Option D

Explanation:
Combined rate = 1/9 + 1/13. Required time = 5.32 days.

This question belongs to: Maths Time and Work

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