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

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1.	Q: 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 the work and leaves after 5 days. The remaining work will be completed by X alone in:
A.	14 days
B.	12 days
C.	10 days
D.	15 days
Answer» B. 12 days

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