A can do a work in 9 days and B in 29 days. In how many days will they complete 75% of the work together? MCQ with Answer and Explanation

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A can do a work in 9 days and B in 29 days. In how many days will they complete 75% of the work together?

A. 12.65

B. 5.15

C. 7.65

D. 10.15

Answer: Option B

Solution (By JKSSB Mock Tests)

Combined time for full work multiplied by 0.75 = 5.15 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 14 days and B in 12 days. If they work together, the work will be completed in:

A. 21.46

B. 6.46

C. 11.46

D. 16.46

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Correct Answer: Option B

Explanation:
Combined rate = 1/14 + 1/12. Required time = 6.46 days.

This question belongs to: Maths Time and Work

Question #2

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17 men can complete a work in 15 days. If 21 men work at the same rate, in how many days will the work be completed?

A. 14.14

B. 16.14

C. 18.14

D. 12.14

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Correct Answer: Option D

Explanation:
Total work = 17 × 15 = 255 man-days. Required days = 255/21 = 12.14 days.

This question belongs to: Maths Time and Work

Question #3

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A can complete a work in 15 days and B can complete the same work in 25 days. If they work together, in how many days will the work be completed?

A. 9.38

B. 15.38

C. 11.38

D. 13.38

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Correct Answer: Option A

Explanation:
Combined rate = 1/15 + 1/25. Time = 1 ÷ combined rate = 9.38 days.

This question belongs to: Maths Time and Work

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