A can do a piece of work in 15 days and B alone can do it in 10 days. B works at it for 5 days and then leaves. A alone can finish the remaining work in Choices
A) 5 days	B) 6 days	C) 7.5 days	D) 8.5 days	E) 8 days
Explanation:   B's 5 days work = 1/10*5=1/2   Remaining work =1âˆ’1/2=1/2   A can finish work =15âˆ—1/2=7.5days   ANSWER IS 7.5 days
<result>C</result>
A can do a piece of work in 15 days and B alone can do it in 10 days. B works at it for 5 days and then leaves. A alone can finish the remaining work in