15 men can complete a work in 25 days. If 19 men work at the same rate, in how many days will the work be completed? MCQ with Answer and Explanation

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15 men can complete a work in 25 days. If 19 men work at the same rate, in how many days will the work be completed?

A. 25.74

B. 21.74

C. 23.74

D. 19.74

Answer: Option D

Solution (By JKSSB Mock Tests)

Total work = 15 × 25 = 375 man-days. Required days = 375/19 = 19.74 days.

This question belongs to: Maths Time and Work

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Question #1

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A can complete a work in 11 days and B can complete the same work in 21 days. If they work together, in how many days will the work be completed?

A. 7.22

B. 9.22

C. 11.22

D. 13.22

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Correct Answer: Option A

Explanation:
Combined rate = 1/11 + 1/21. Time = 1 ÷ combined rate = 7.22 days.

This question belongs to: Maths Time and Work

Question #2

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A and B work together. A alone can complete the work in 30 days and B alone in 28 days. What percentage of the total daily work is contributed by A?

A. 48.28

B. 53.28

C. 55.78

D. 50.78

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Correct Answer: Option A

Explanation:
A share = (1/30) / (1/30+1/28) ×100 = 48.28%.

This question belongs to: Maths Time and Work

Question #3

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A can complete a work in 22 days and B in 12 days. If they work together, the work will be completed in:

A. 12.76

B. 17.76

C. 7.76

D. 22.76

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Correct Answer: Option C

Explanation:
Combined rate = 1/22 + 1/12. Required time = 7.76 days.

This question belongs to: Maths Time and Work

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