Question

A can do a piece of work in 15 days and b alone can do it in 10 days . B works at it for 5days and then leaves . A alone can finish the work in how many days

Answer 1

Answer:

Step-by-step explanation:

A 1 day work = 1/15

B 1 day work.= 1/10

B 5 day work = 5/10 = 1/2

Remaining work = 1 - 1/2 = 1/2

Days required for 1 work done byA = 15

Days required for 1/2 work done = 15/2 = 7.5