Time and Work Practice Test 3 with solutions

Question : 20 of 40

Marks: +1, -0

A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day?

18 days
16 days
15 days
12 days

Validate

Solution:

In 3 days the work done by A, B and C =

3/{20}+1/{30}+1/{60}

{12}/{60}

1/5

Hence, whole work done by A, B and C in 5 × 3 = 15 days.

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