Question

C.
D.
O 16 hours
O 18 hours
9
The efficiencies of X and Y are in the ratio 7:9. If Y can do a piece of work in 28 hours, then X can do it in:
5:A.
O 36 hours
B.
45 hours
C.
27 hours
D.
() 18 hours​

Answer 1

Answer:

It will work upto 18 hours option is D