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A can do a piece of work in 12 days, and B in 15 days. They work together for 5 days and then B left. The days taken A to finish the remaining work is ?
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Please briefly explain why you feel this answer should be reported .
Let’s assume Total work is 1 Unit.
A’s working capacity = 1/12 unit per day
B’s working capacity = 1/15 unit per day
So, A’s + B’s working capacity = 3/20 unit per day
Remaining unit of work, after A and B worked together = 1 – 3/20*5 = 1/4 unit
Time taken by A to complete the work = 3 days
Please briefly explain why you feel this answer should be reported .
3days