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