A can do a work in 15 days and B in 17 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 15 days and B in 17 days. In how many days will they complete 75% of the work together?

A. 10.98

B. 8.48

C. 5.98

D. 13.48

Answer: Option C

Solution (By JKSSB Mock Tests)

Combined time for full work multiplied by 0.75 = 5.98 days.

This question belongs to: Maths Time and Work

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Question #1

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A and B work together. A alone can complete the work in 18 days and B alone in 36 days. What percentage of the total daily work is contributed by A?

A. 69.17

B. 66.67

C. 71.67

D. 74.17

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Correct Answer: Option B

Explanation:
A share = (1/18) / (1/18+1/36) ×100 = 66.67%.

This question belongs to: Maths Time and Work

Question #2

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31 men can complete a work in 29 days. If 39 men work at the same rate, how many days are required?

A. 28.05

B. 25.55

C. 23.05

D. 30.55

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Correct Answer: Option C

Explanation:
Total work = 899 man-days. Days = 23.05.

This question belongs to: Maths Time and Work

Question #3

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A can complete a work in 24 days and B in 29 days. If they work together, the work will be completed in:

A. 28.13

B. 13.13

C. 18.13

D. 23.13

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Correct Answer: Option B

Explanation:
Combined rate = 1/24 + 1/29. Required time = 13.13 days.

This question belongs to: Maths Time and Work

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