Mathematics, 04.04.2021 14:00 paulusl19

A does 1/2 of a piece of work in 3 1/2 hours B does 1/4 of the remainder in 1 1/2 hours and C then finishes the work in 5 1/4 hours. How long would it have taken the three working together to do the works

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A does 1/2 of a piece of work in 3 1/2 hours B does 1/4 of the remainder in 1 1/2 hours and C then f...

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