A can complete a work in 21 days and B in 25 days. If they work together, the work will be completed in: MCQ with Answer and Explanation

A can complete a work in 21 days and B in 25 days. If they work together, the work will be completed in:

A. 26.41

B. 21.41

C. 11.41

D. 16.41

Answer: Option C

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

This question belongs to: Maths Time and Work

No comments yet. Be the first to start the discussion!

Question #1 Report Error

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. 12.32

C. 17.32

D. 14.82

Correct Answer: Option B

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

This question belongs to: Maths Time and Work

Question #2 Report Error

14 men can complete a work in 18 days. If 18 men work at the same rate, in how many days will the work be completed?

A. 14.0

B. 16.0

C. 20.0

D. 18.0

Correct Answer: Option A

Explanation:
Total work = 14 × 18 = 252 man-days. Required days = 252/18 = 14.0 days.

This question belongs to: Maths Time and Work

Question #3 Report Error

A can complete a work in 22 days and B in 26 days. If both work together, in how many days will the work be completed?

A. 11.92

B. 19.42

C. 16.92

D. 14.42

Correct Answer: Option A

Explanation:
Combined rate = 1/22 + 1/26. Time = 11.92 days.

This question belongs to: Maths Time and Work