Question

3.
A can do a piece of work in 25 days and B can finish it in 20 days. They work
together for 5 days and then A leaves. In how many days will B finish the
remaining work?
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Answer 1

Step-by-step explanation:

A & B together can complete work in (25x20)/(25+20) =500/45 = 100/9 days.

They complete 5 x 9/100= 9/20 work in 5 days.

Remaining 11/20 work done by B in 11/20 x 20 = 11 days.