Mahesh can do a piece of work in 35days. He works at it for 20days and then Rajesh finished it in 30days. How long will Y take to complete the work?  Pick
A) 45  B) 25  C) 37  D) 41  E) 70

Rationale: "work done by mahesh in 35 days = 20 * 1 / 35 = 4 / 7 remaining work = 1 - 4 / 7 = 3 / 7 3 / 7 work is done by rajesh in 30 days whole work will be done by rajesh is 30 * 7 / 3 = 70 days answer is e"
Answer: E