A can complete a work in 12 days and B in 25 days. If they work together, the work will be completed in: MCQ with Answer and Explanation

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A can complete a work in 12 days and B in 25 days. If they work together, the work will be completed in:

A. 23.11

B. 8.11

C. 13.11

D. 18.11

Answer: Option B

Solution (By JKSSB Mock Tests)

Combined rate = 1/12 + 1/25. Required time = 8.11 days.

This question belongs to: Maths Time and Work

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Question #1

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17 men can complete a work in 27 days. If 21 men work at the same rate, in how many days will the work be completed?

A. 27.86

B. 25.86

C. 23.86

D. 21.86

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Correct Answer: Option D

Explanation:
Total work = 17 × 27 = 459 man-days. Required days = 459/21 = 21.86 days.

This question belongs to: Maths Time and Work

Question #2

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A can complete a work in 8 days and B in 13 days. If they work together, the work will be completed in:

A. 4.95

B. 14.95

C. 19.95

D. 9.95

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Correct Answer: Option A

Explanation:
Combined rate = 1/8 + 1/13. Required time = 4.95 days.

This question belongs to: Maths Time and Work

Question #3

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18 men can complete a work in 22 days. If 22 men work at the same rate, in how many days will the work be completed?

A. 22.0

B. 18.0

C. 24.0

D. 20.0

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Correct Answer: Option B

Explanation:
Total work = 18 × 22 = 396 man-days. Required days = 396/22 = 18.0 days.

This question belongs to: Maths Time and Work

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