A can complete a work in 25 days and B in 18 days. If both work together, in how many days will the work be completed? MCQ with Answer and Explanation

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A can complete a work in 25 days and B in 18 days. If both work together, in how many days will the work be completed?

A. 15.47

B. 10.47

C. 12.97

D. 17.97

Answer: Option B

Solution (By JKSSB Mock Tests)

Combined rate = 1/25 + 1/18. Time = 10.47 days.

This question belongs to: Maths Time and Work

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Question #1

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A can do a work in 11 days and B in 17 days. In how many days will they complete 75% of the work together?

A. 12.51

B. 5.01

C. 10.01

D. 7.51

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Correct Answer: Option B

Explanation:
Combined time for full work multiplied by 0.75 = 5.01 days.

This question belongs to: Maths Time and Work

Question #2

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A can complete a work in 12 days and B in 24 days. After working together for 5 days, what percentage of work remains?

A. 37.5

B. 42.5

C. 45.0

D. 40.0

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Correct Answer: Option A

Explanation:
Remaining work = (1 - 5*(1/12+1/24))×100 = 37.5%.

This question belongs to: Maths Time and Work

Question #3

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A can do a work in 13 days and B in 23 days. In how many days will they complete 75% of the work together?

A. 8.73

B. 6.23

C. 11.23

D. 13.73

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Correct Answer: Option B

Explanation:
Combined time for full work multiplied by 0.75 = 6.23 days.

This question belongs to: Maths Time and Work

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