R is 80% more efficient than S. If S alone can make a book in 90 days, then R alone can make the book in how many days?_x005F_x000D_ Â _x005F_x000D_

R is 80% more efficient than S. If S alone can make a book in 90 days,

1.	R is 80% more efficient than S. If S alone can make a book in 90 days, then R alone can make the book in how many days?_x005F_x000D_ Â _x005F_x000D_
A.	65
B.	60
C.	50
D.	70
Answer» D. 70

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R is 80% more efficient than S. If S alone can make a book in 90 days, then R alone can make the book in how many days?_x005F_x000D_ Â _x005F_x000D_

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