Time Work Important Question Answer, Time Work Competition Question with Solution

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Question. 1

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?

A.            12 days

B.            15 days

C.            16 days

D.            18 days

Solution

A’s can do work – 20 days

B’s can complete work – 30 days

C’s Can complete work in – 60 days

Now we take LCM of A, B & C work that is 60

Now we calculate A’s two Days work that is 1/20*2 = 1/10

A,B & C’s one day work is  = 1/20+1/30+1/60 = 6/60 = 1/10

Workdone completed in 3 days is  = 1/10 + 1/10 = 1/5

  

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