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

A can complete a work in 15 days and B in 15 days. If they work together, the work will be completed in:
A. 22.5
B. 12.5
C. 7.5
D. 17.5
Answer: Option C
Solution (By JKExamLibrary)
Combined rate = 1/15 + 1/15. Required time = 7.5 days.

This question belongs to: Maths Time and Work

Discuss this Question (0)

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

Practice More Time and Work Questions

Question #1 Report Error
If 3 men or 6 women can do a piece of work in 16 days, in how many days can 12 men and 8 women do the same work?
A. 2 days
B. 4 days
C. 5 days
D. 3 days

Correct Answer: Option D


Explanation:
3 Men = 6 Women => 1 Man = 2 Women. 12 Men + 8 Women = 12(2 Women) + 8 Women = 32 Women. If 6 women do it in 16 days, then 32 women do it in (6 * 16) / 32 = 3 days.

This question belongs to: Maths Time and Work
Question #2 Report Error
A can complete a work in 24 days and B can complete the same work in 29 days. If they work together, in how many days will the work be completed?
A. 17.13
B. 19.13
C. 13.13
D. 15.13

Correct Answer: Option C


Explanation:
Combined rate = 1/24 + 1/29. Time = 1 รท combined rate = 13.13 days.

This question belongs to: Maths Time and Work
Question #3 Report Error
A can complete a work in 18 days and B in 27 days. If they work together, the work will be completed in:
A. 25.8
B. 10.8
C. 20.8
D. 15.8

Correct Answer: Option B


Explanation:
Combined rate = 1/18 + 1/27. Required time = 10.8 days.

This question belongs to: Maths Time and Work