X is twice as efficient as Y . If they both complete a work in 30 days – McqOptions

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1.	X is twice as efficient as Y . If they both complete a work in 30 days, then find the number of days required by X to complete the work individually.
A.	25 days
B.	45 days
C.	90 days
D.	50 days
Answer» C. 90 days

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