A can complete a work in 23 days and B can complete the same work in 18 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 23 days and B can complete the same work in 18 days. If they work together, in how many days will the work be completed?

A. 12.1

B. 16.1

C. 14.1

D. 10.1

Answer: Option D

Solution (By JKSSB Mock Tests)

Combined rate = 1/23 + 1/18. Time = 1 ÷ combined rate = 10.1 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. What percentage of work will A complete in 6 days?

A. 27.27

B. 42.27

C. 37.27

D. 32.27

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Correct Answer: Option A

Explanation:
Percentage completed = (6/22) × 100 = 27.27%.

This question belongs to: Maths Time and Work

Question #2

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A can complete a work in 21 days and B in 38 days. If both work together, in how many days will the work be completed?

A. 16.03

B. 21.03

C. 13.53

D. 18.53

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Correct Answer: Option C

Explanation:
Combined rate = 1/21 + 1/38. Time = 13.53 days.

This question belongs to: Maths Time and Work

Question #3

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20 men can complete a work in 22 days. If 25 men work at the same rate, the work will be completed in:

A. 22.6

B. 17.6

C. 32.6

D. 27.6

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Correct Answer: Option B

Explanation:
Total work = 440 man-days. Time = 440/25 = 17.6 days.

This question belongs to: Maths Time and Work

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