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. 17.97

D. 12.97

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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12 men can complete a work in 8 days. How many days will 16 men take to complete the same work?

A. 5 days

B. 6 days

C. 7 days

D. 4 days

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Correct Answer: Option B

Explanation:
Using the formula M1 * D1 = M2 * D2: 12 * 8 = 16 * D2. 96 = 16 * D2. D2 = 96 / 16 = 6 days.

This question belongs to: Maths Time and Work

Question #2

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A can do a work in 19 days and B in 23 days. In how many days will they complete 75% of the work together?

A. 7.8

B. 12.8

C. 15.3

D. 10.3

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Correct Answer: Option A

Explanation:
Combined time for full work multiplied by 0.75 = 7.8 days.

This question belongs to: Maths Time and Work

Question #3

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A can complete a work in 21 days and B in 31 days. If both work together, in how many days will the work be completed?

A. 12.52

B. 17.52

C. 15.02

D. 20.02

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Correct Answer: Option A

Explanation:
Combined rate = 1/21 + 1/31. Time = 12.52 days.

This question belongs to: Maths Time and Work

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