A can complete a work in 15 days and B in 25 days. If both work together, in how many days will the work be completed? MCQ with Answer and Explanation

A can complete a work in 15 days and B in 25 days. If both work together, in how many days will the work be completed?

A. 9.38

B. 11.88

C. 14.38

D. 16.88

Answer: Option A

Combined rate = 1/15 + 1/25. Time = 9.38 days.

This question belongs to: Maths Time and Work

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Question #1 Report Error

A can complete a work in 13 days and B in 42 days. If both work together, in how many days will the work be completed?

A. 17.43

B. 14.93

C. 9.93

D. 12.43

Correct Answer: Option C

Explanation:
Combined rate = 1/13 + 1/42. Time = 9.93 days.

This question belongs to: Maths Time and Work

Question #2 Report Error

A can complete a work in 31 days and B in 24 days. If both work together, in how many days will the work be completed?

A. 18.53

B. 16.03

C. 21.03

D. 13.53

Correct Answer: Option D

Explanation:
Combined rate = 1/31 + 1/24. Time = 13.53 days.

This question belongs to: Maths Time and Work

Question #3 Report Error

A can complete a work in 15 days and B in 18 days. If they work together, the work will be completed in:

A. 13.18

B. 23.18

C. 8.18

D. 18.18

Correct Answer: Option C

Explanation:
Combined rate = 1/15 + 1/18. Required time = 8.18 days.

This question belongs to: Maths Time and Work