Q. 134.0( 16 Votes )

A can do a piece

Answer :

Number of hours A required do a piece of work : 25

Number of hours B required do a piece of work : 20

Work done by A in one hour:

Work done by B in one hour:

A works alone for 10 hours, so work completed by A in 10 hours : 10 =

Work left =

Work done by A and B together in one hour: =

They can do the work together in hours.

But th of the work is done by both A and B

Time required to complete th of the work together by A and B : hours

Time taken to finish the work: = hours

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RS Aggarwal - Mathematics