Arun and Tarun can do a work in 10 days. After 4 days Tarun went to his village. How many days are r

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22 Aug 2012 work time problem

Arun and Tarun can do a work in 10 days. After 4 days Tarun went to his village. How many days are required to complete the remaining work by Arun alone. Arun can do the work alone in 30 days.

OPtion

1) 6
2) 8
3) 10
4) 12
5) 15
6) 18
7) 20
8) 21
9) 24
10) none of these

Solution

After 4 days Tarun went to his village.
then remaining work = 6/10 part
one day work of Arun = 1/30 part
so days required = 6/10/1/30 = 180/10 = 18 days

Correct Option: 6 Best Solution (0)