A, B and C can complete a piece of work in 4, 20 and 60 days respectively. Working together, they can complete the same work in how many days?

A, B and C can complete a piece of work in 4, 20 and 60 days respectiv

1.	A, B and C can complete a piece of work in 4, 20 and 60 days respectively. Working together, they can complete the same work in how many days?
A.	31/19
B.	53/19
C.	60/19
D.	51/19
Answer» D. 51/19

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A, B and C can complete a piece of work in 4, 20 and 60 days respectively. Working together, they can complete the same work in how many days?

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