A can complete a work in 18 days and B in 39 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 18 days and B in 39 days. If both work together, in how many days will the work be completed?

A. 19.82

B. 14.82

C. 17.32

D. 12.32

Answer: Option D

Solution (By JKSSB Mock Tests)

Combined rate = 1/18 + 1/39. Time = 12.32 days.

This question belongs to: Maths Time and Work

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Question #1

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A can do a work in 13 days and B in 29 days. In how many days will they complete 75% of the work together?

A. 11.73

B. 6.73

C. 9.23

D. 14.23

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Correct Answer: Option B

Explanation:
Combined time for full work multiplied by 0.75 = 6.73 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 43 days. If both work together, in how many days will the work be completed?

A. 13.65

B. 16.15

C. 21.15

D. 18.65

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Correct Answer: Option A

Explanation:
Combined rate = 1/20 + 1/43. Time = 13.65 days.

This question belongs to: Maths Time and Work

Question #3

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A can complete a work in 32 days and B in 26 days. If both work together, in how many days will the work be completed?

A. 21.84

B. 14.34

C. 16.84

D. 19.34

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Correct Answer: Option B

Explanation:
Combined rate = 1/32 + 1/26. Time = 14.34 days.

This question belongs to: Maths Time and Work

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