X alone can do a piece of work in 5 days. Y can do the same piece of work in 4 days. X and Y are assigned to do the work for Rs 5000. They complete the work in 2 days with the help of Z. How much is to be paid to Z?
The correct option is D Rs 500
Z's one day work =12−(15+14)=10−4−520=520=120
Ratio = 15:14:120=4:5:1