The Whole Work is Complete In-
Raja can do a piece of work in 20 days while Ramesh can finish it in 25 days. Ramesh started working and Raja joined him after 10 days. The whole work is complete in-
- 20 days
- 50/3 days
- 15 days
- 18 days
Answer: (2) 50/3 days
Explanation:-
Raja can do a piece of work = 20 days
Therefore, Raja can do a piece of work in a day = 1/20
Ramesh can do a piece of work = 25 days
Therefore, Ramesh can do a piece of work in a day = 1/25
Raja and Ramesh can do together work in a day = 1/20 + 1/25
= (5 + 4)/100
= 9/100
Then, Raja and Ramesh can do together work = 100/9 days
Ramesh can do a work in 10 days = 10/25
Remaining work = 1 – 10/25
= (25 – 10)/25 = 15/25
= 3/5
Then, Raja & Ramesh can do complete remaining work = 100 x 3/5 x 9
= 20/3
Therefore, the whole work is complete = 10 + 20/3
= (30 + 20)/3
= 50/3 days
Hence, the answer is (2) 50/3 days.