A can complete a work in 20 days and B in 36 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 20 days and B in 36 days. If both work together, in how many days will the work be completed?

A. 20.36

B. 12.86

C. 17.86

D. 15.36

Answer: Option B

Solution (By JKSSB Mock Tests)

Combined rate = 1/20 + 1/36. Time = 12.86 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 30 days and B alone in 30 days. What percentage of the total daily work is contributed by A?

A. 57.5

B. 55.0

C. 52.5

D. 50.0

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Correct Answer: Option D

Explanation:
A share = (1/30) / (1/30+1/30) ×100 = 50.0%.

This question belongs to: Maths Time and Work

Question #2

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15 men can complete a work in 23 days. If 23 men work at the same rate, how many days are required?

A. 17.5

B. 20.0

C. 15.0

D. 22.5

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Correct Answer: Option C

Explanation:
Total work = 345 man-days. Days = 15.0.

This question belongs to: Maths Time and Work

Question #3

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A can complete a work in 22 days. What percentage of work will A complete in 6 days?

A. 37.27

B. 27.27

C. 42.27

D. 32.27

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Correct Answer: Option B

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

This question belongs to: Maths Time and Work

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