Sachin can do a work in 15 days and Virat in 20 days. If they work on it together for 4 days, then t

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01 May 2020 Work and Time

Sachin can do a work in 15 days and Virat in 20 days. If they work on it together for 4 days, then the fraction of the work that is left is

OPtion

1) 1/15
2) 53/60
3) 2/15
4) 3/15
5) 8/15
6) 6/15
7) 7/15
8) 11/15
9) 4
10) None of these

Solution

Sachin's 1 day's work = 1/15 Virat's 1 day's work = 1/20

(Sachin + Virat)'s 1 day's work = (1/15 + 1/20) = 7/60


(Sachin + Virat)'s 4 day's work = 4* (7/60) = 7/15

Remaining work = 1 - 7/15 = 8/15

Correct Option: 5 Best Solution (0)