Q. 114.0( 43 Votes )

A, B and C can do

Answer :

Number of days A required do a piece of work : 15 days


Number of days B required do a piece of work : 12 days


Number of days C required do a piece of work : 20 days


Work done by A in one day:


Work done by B in one day:


Work done by C in one day:


Work done by A, B and C together in one day: =


They can do the work together in 5 days.


A, B and C worked together for 2 days, so work completed by A, B and C in 2 days : 2 =


Work left =


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


They can do the work together in days.


Number of days taken by A and B to complete the left over work : = 4 ( here is days required by A and B to complete the work).


Time taken to finish the left over work: 4 days.


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RS Aggarwal - Mathematics