you can do a piece of work in 8 days, B can do it in 16,While C can do it in 80 days. In how many days they can complete the whole work, working together?

5
6
8 2/3
20 2/5

Correct Answer: 5

Explanation:

Efficiency of A = 12.5%
Efficiency of B = 6.25%
Efficiency of C = 1.25%
Efficiency of (A+ B + C) = (12.5 +6.25 + 1.25) = 20%
Required no of days = 100/20 = 5 days

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