A motorboat goes some distance downstream in 2x hours but it returns only 75% of the previous distance in 1.75x hours. What is the ratio of the speed of the motorboat in still water to the speed of stream?

A motorboat goes some distance downstream in 2x hours but it returns o

1.	A motorboat goes some distance downstream in 2x hours but it returns only 75% of the previous distance in 1.75x hours. What is the ratio of the speed of the motorboat in still water to the speed of stream?
A.	5 : 1
B.	7 : 1
C.	13 : 1
D.	9 : 2
E.	None of these
Answer» D. 9 : 2

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A motorboat goes some distance downstream in 2x hours but it returns only 75% of the previous distance in 1.75x hours. What is the ratio of the speed of the motorboat in still water to the speed of stream?

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