Kunal can do a piece of work in 60 days He works at it for 10 days and then Mohit alone finishes the...........

Quantitative Aptitude (CDS) Time and work

Kunal can do a piece of work in 60 days. He works at it for 10 days and then Mohit alone finishes the remaining work in 35 days. In how much time will Kunal and Mohit working together, finish the work?

258/13days

29days

200/13days

247/10days

Explanation:

Work done by kunal in 10 days = 1/60 ×10 = 1/6
Remaining work = (1 - 1/6) = 5/6
Now, 5/6 work is done by Mohit in 35 days.
Whole work will be done by Mohit in (35×6/5) = 42days
Kunal's 1 days work = 1/60 and Mohit's work = 1/42
(Kunal + Mohit)'s 1 days work = (1/60 + 1/42)
= 17/420 days = 1/24.7 days
= Hence both will finish the work in 247/10days