A can complete a work in 20 days and B can complete the same work in 25 days. If they work together, in how many days will the work be completed? MCQ with Answer and Explanation

Question

A can complete a work in 20 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. 13.11

B. 17.11

C. 15.11

D. 11.11

Answer: Option D

Solution (By JKSSB Mock Tests)

Combined rate = 1/20 + 1/25. Time = 1 ÷ combined rate = 11.11 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 22 days and B can complete the same work in 32 days. If they work together, in how many days will the work be completed?

A. 19.04

B. 13.04

C. 15.04

D. 17.04

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Correct Answer: Option B

Explanation:
Combined rate = 1/22 + 1/32. Time = 1 ÷ combined rate = 13.04 days.

This question belongs to: Maths Time and Work

Question #2

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A can do a work in 13 days and B in 17 days. In how many days will they complete 75% of the work together?

A. 13.02

B. 8.02

C. 5.52

D. 10.52

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Correct Answer: Option C

Explanation:
Combined time for full work multiplied by 0.75 = 5.52 days.

This question belongs to: Maths Time and Work

Question #3

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A can complete a work in 16 days and B can complete the same work in 16 days. If they work together, in how many days will the work be completed?

A. 10.0

B. 12.0

C. 14.0

D. 8.0

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Correct Answer: Option D

Explanation:
Combined rate = 1/16 + 1/16. Time = 1 ÷ combined rate = 8.0 days.

This question belongs to: Maths Time and Work

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