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30	31	1	2	3	4	5

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Multiple Choice Questions

A can do a work in 12 days when he had worked for 3 days B joined him if they complete the work in 3...........

Quantitative Aptitude (Punjab Allied ) Time and work

A can do a work in 12 days when he had worked for 3 days B joined him if they complete the work in 3 more days. In how many days can B alone finish the work.

2 days

5 days

4 days

6 days

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Explanation:

Solution:
A’s 1 day’s of work = 3/12 = ¼
Remaining work = 1 – (1/4) = ¾ days
(A+B)———( ¾)—— 3 days
(A+B)———1———- 4 days
(A+B) takes = 4 days to complete the work
A takes = 12 days to complete the work
total work = 12 units
B can complete the work in = 12/ 2 = 6 days

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