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Question

A, B and C working together can finish a piece of work in 8 hours. A alone can do it in 20 hours and B alone can do It in 24 hours. In how many hours will C atone do the salve work?

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Solution

A,B and C's 1 hour's work =18

A's 1 hour's work =120

B's 1 hour's work =124

C's 1 hours work =18(120+124)

=15(6+5)120=1511120

=4120=130

C alone finish the work in =30 hours.


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