A can complete a work in 13 days and B in 20 days. If they work together, the work will be completed in: MCQ with Answer and Explanation

A can complete a work in 13 days and B in 20 days. If they work together, the work will be completed in:

A. 12.88

B. 22.88

C. 17.88

D. 7.88

Answer: Option D

Combined rate = 1/13 + 1/20. Required time = 7.88 days.

This question belongs to: Maths Time and Work

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Question #1 Report Error

29 men can complete a work in 32 days. If 37 men work at the same rate, how many days are required?

A. 27.58

B. 30.08

C. 32.58

D. 25.08

Correct Answer: Option D

Explanation:
Total work = 928 man-days. Days = 25.08.

This question belongs to: Maths Time and Work

Question #2 Report Error

14 men can complete a work in 26 days. If 19 men work at the same rate, the work will be completed in:

A. 24.16

B. 29.16

C. 34.16

D. 19.16

Correct Answer: Option D

Explanation:
Total work = 364 man-days. Time = 364/19 = 19.16 days.

This question belongs to: Maths Time and Work

Question #3 Report Error

21 men can complete a work in 18 days. If 26 men work at the same rate, the work will be completed in:

A. 29.54

B. 24.54

C. 14.54

D. 19.54

Correct Answer: Option C

Explanation:
Total work = 378 man-days. Time = 378/26 = 14.54 days.

This question belongs to: Maths Time and Work