A can complete a work in 13 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 13 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. 11.55

B. 9.55

C. 7.55

D. 13.55

Answer: Option C

Solution (By JKSSB Mock Tests)

Combined rate = 1/13 + 1/18. Time = 1 ÷ combined rate = 7.55 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 18 days and B in 19 days. If they work together, the work will be completed in:

A. 19.24

B. 24.24

C. 9.24

D. 14.24

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Correct Answer: Option C

Explanation:
Combined rate = 1/18 + 1/19. Required time = 9.24 days.

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 25 days. If they work together, the work will be completed in:

A. 21.41

B. 11.41

C. 16.41

D. 26.41

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Correct Answer: Option B

Explanation:
Combined rate = 1/21 + 1/25. Required time = 11.41 days.

This question belongs to: Maths Time and Work

Question #3

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A can complete a work in 18 days and B in 46 days. If both work together, in how many days will the work be completed?

A. 20.44

B. 15.44

C. 12.94

D. 17.94

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Correct Answer: Option C

Explanation:
Combined rate = 1/18 + 1/46. Time = 12.94 days.

This question belongs to: Maths Time and Work

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