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? MCQ with Answer and Explanation

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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. 16.0

C. 12.0

D. 14.0

Answer: Option C

Solution (By JKSSB Mock Tests)

Total work = 8 × 18 = 144 man-days. Required days = 144/12 = 12.0 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 34 days and B in 45 days. If both work together, in how many days will the work be completed?

A. 26.87

B. 19.37

C. 21.87

D. 24.37

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Correct Answer: Option B

Explanation:
Combined rate = 1/34 + 1/45. Time = 19.37 days.

This question belongs to: Maths Time and Work

Question #2

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A can complete a work in 11 days and B in 14 days. If they work together, the work will be completed in:

A. 21.16

B. 6.16

C. 16.16

D. 11.16

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Correct Answer: Option B

Explanation:
Combined rate = 1/11 + 1/14. Required time = 6.16 days.

This question belongs to: Maths Time and Work

Question #3

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A can complete a work in 16 days and B in 32 days. After working together for 5 days, what percentage of work remains?

A. 60.62

B. 53.12

C. 58.12

D. 55.62

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Correct Answer: Option B

Explanation:
Remaining work = (1 - 5*(1/16+1/32))×100 = 53.12%.

This question belongs to: Maths Time and Work

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