A can do a work in 9 days and B in 23 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 23 days. In how many days will they complete 75% of the work together?

A. 7.35

B. 12.35

C. 9.85

D. 4.85

Answer: Option D

Solution (By JKSSB Mock Tests)

Combined time for full work multiplied by 0.75 = 4.85 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 30 days and B in 29 days. If both work together, in how many days will the work be completed?

A. 14.75

B. 17.25

C. 19.75

D. 22.25

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Correct Answer: Option A

Explanation:
Combined rate = 1/30 + 1/29. Time = 14.75 days.

This question belongs to: Maths Time and Work

Question #2

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9 men can complete a work in 19 days. If 13 men work at the same rate, in how many days will the work be completed?

A. 13.15

B. 15.15

C. 19.15

D. 17.15

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Correct Answer: Option A

Explanation:
Total work = 9 × 19 = 171 man-days. Required days = 171/13 = 13.15 days.

This question belongs to: Maths Time and Work

Question #3

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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. 23.86

B. 27.86

C. 25.86

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

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