A can do a work in 21 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 21 days and B in 23 days. In how many days will they complete 75% of the work together?

A. 13.23

B. 10.73

C. 8.23

D. 15.73

Answer: Option C

Solution (By JKSSB Mock Tests)

Combined time for full work multiplied by 0.75 = 8.23 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 13 days and B can complete the same work in 23 days. If they work together, in how many days will the work be completed?

A. 10.31

B. 12.31

C. 14.31

D. 8.31

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Correct Answer: Option D

Explanation:
Combined rate = 1/13 + 1/23. Time = 1 ÷ combined rate = 8.31 days.

This question belongs to: Maths Time and Work

Question #2

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A can complete a work in 9 days and B in 16 days. If they work together, the work will be completed in:

A. 20.76

B. 5.76

C. 10.76

D. 15.76

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Correct Answer: Option B

Explanation:
Combined rate = 1/9 + 1/16. Required time = 5.76 days.

This question belongs to: Maths Time and Work

Question #3

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A can complete a work in 17 days and B in 13 days. If they work together, the work will be completed in:

A. 7.37

B. 12.37

C. 17.37

D. 22.37

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Correct Answer: Option A

Explanation:
Combined rate = 1/17 + 1/13. Required time = 7.37 days.

This question belongs to: Maths Time and Work

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