A, B and C can complete a piece of work in 4, 28 and 56 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, 28 and 56 days respectiv

1.	A, B and C can complete a piece of work in 4, 28 and 56 days respectively. Working together, they can complete the same work in how many days?
A.	\(3\frac{4}{{17}}\)
B.	\(3\frac{2}{{17}}\)
C.	\(3\frac{3}{{17}}\)
D.	\(3\frac{5}{{17}}\)
Answer» E.

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A, B and C can complete a piece of work in 4, 28 and 56 days respectively. Working together, they can complete the same work in how many days?

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