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

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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. 16.0

B. 18.0

C. 20.0

D. 22.0

Answer: Option A

Solution (By JKSSB Mock Tests)

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

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A can complete a work in 17 days and B can complete the same work in 27 days. If they work together, in how many days will the work be completed?

A. 16.43

B. 14.43

C. 12.43

D. 10.43

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Correct Answer: Option D

Explanation:
Combined rate = 1/17 + 1/27. Time = 1 ÷ combined rate = 10.43 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. 11.39

C. 16.39

D. 8.89

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Correct Answer: Option D

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 20 days and B can complete the same work in 15 days. If they work together, in how many days will the work be completed?

A. 8.57

B. 12.57

C. 14.57

D. 10.57

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Correct Answer: Option A

Explanation:
Combined rate = 1/20 + 1/15. Time = 1 ÷ combined rate = 8.57 days.

This question belongs to: Maths Time and Work

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