Question

X and Y together complete a task in 4 days, Y and Z together in 5 days. If they work independently, who will finish the work in the least time? A. X B. Y C. Z D. Not enough information to decide

Answer 1

c, Z

Explanation:

x+y=4

y+z=5

y=4-x

4-x+z=5

-x+z=1

z=1+x