John does 1/2 piece of work in 3 hours, Joe does 1/4 of the remaining work in 1 hour and George finishes remaining work in 5 hours. How long would it have taken the three working together to do the work?

John does 1/2 piece of work in 3 hours, Joe does 1/4 of the remaining

1.	John does 1/2 piece of work in 3 hours, Joe does 1/4 of the remaining work in 1 hour and George finishes remaining work in 5 hours. How long would it have taken the three working together to do the work?
A.	\(2\frac{1}{7}\;hours\)
B.	\(3\frac{1}{7}\;hours\)
C.	\(3\frac{8}{{11}}\;hours\)
D.	\(2\frac{8}{{11}}\;hours\)
Answer» E.

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John does 1/2 piece of work in 3 hours, Joe does 1/4 of the remaining work in 1 hour and George finishes remaining work in 5 hours. How long would it have taken the three working together to do the work?

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