To do a certain work, the ratio of the efficiencies of X and Y is 5 � – McqOptions

MCQOPTIONS

1.	To do a certain work, the ratio of the efficiencies of X and Y is 5 ∶ 4 Working together, they can complete the same work in 10 days. Y alone starts work and leave after 5 days. The remaining work completed by X alone in
A.	15 days
B.	10 days
C.	12 days
D.	14 days
Answer» E.

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