Question

A alone can do a piece of work in 12 days and b alone can do it in 15 days. A and b undertook to do it for rs. 1200. With the help of c they finished it in 5 days. How much is paid to c?

Answer 1

Rs300 has to be paid to C. 1day work of A&B= (1/12+1/15)= 5/60+4/60 Amt for A=1200*5/60*5days=500 Amt for B=1200*4/60*5days=400 Amt for C=1200-(500+400)=300