A and B work together. A alone can complete the work in 18 days and B alone in 22 days. What percentage of the total daily work is contributed by A? MCQ with Answer and Explanation

Question

A and B work together. A alone can complete the work in 18 days and B alone in 22 days. What percentage of the total daily work is contributed by A?

A. 60.0

B. 57.5

C. 62.5

D. 55.0

Answer: Option D

Solution (By JKSSB Mock Tests)

A share = (1/18) / (1/18+1/22) ×100 = 55.0%.

This question belongs to: Maths Time and Work

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Question #1

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17 men can complete a work in 15 days. If 21 men work at the same rate, in how many days will the work be completed?

A. 18.14

B. 12.14

C. 16.14

D. 14.14

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Correct Answer: Option B

Explanation:
Total work = 17 × 15 = 255 man-days. Required days = 255/21 = 12.14 days.

This question belongs to: Maths Time and Work

Question #2

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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. 17.86

B. 20.36

C. 12.86

D. 15.36

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Correct Answer: Option C

Explanation:
Combined rate = 1/20 + 1/36. Time = 12.86 days.

This question belongs to: Maths Time and Work

Question #3

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A can complete a work in 18 days. What percentage of work will A complete in 6 days?

A. 48.33

B. 38.33

C. 43.33

D. 33.33

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Correct Answer: Option D

Explanation:
Percentage completed = (6/18) × 100 = 33.33%.

This question belongs to: Maths Time and Work

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