Question

X and Y together complete a job in 18 days, while Y alone can do it in 30 days. The ratio of efficiencies of X and Z is 4:5 respectively. What is the ratio of efficiencies of Y and Z?

A 8:9
B 6:5
C 5:4
D 9:10
E None of these
Practice Next

More Time and work Questions

Hey! Ask a query