X,Y and Z can complete a piece of work in 9, 18 and 24 days respectively. They started working together, but Y and z left the work 3 days and 2 days before the completion of the work resp. What was the ratio of contribution of y to that of z in the completed piece of work ?
A. 2:3
B. 1:1
C. 4:5
D. 3:2
Answer:B
X,Y and Z can complete a piece of work in 9, 18 and 24 days respectively. They started working together, but Y and z left the work 3 days and 2 days before the completion of the work resp. What was the ratio of contribution of y to that of z in the completed piece of work ?
A. 2:3 B. 1:1 C. 4:5 D. 3:2