Question

A alone complete the work in 18 days and b 15 days .B alone worked at it for 10 days and then left the work .In howmany more days will a alone complete the remaining work

Answer 1

work done in one day =1/18 +1/15= 11/90
B work for 10 days =11/90-1/10
=2/10 =1/5
A can do it in 5 days