A boat can travel 60 km in 3 hours while going downstream, it can travel 90 km in 5 hours while going upstream. What is the ratio of the speed of boat in still water to the speed of the stream?

A boat can travel 60 km in 3 hours while going downstream, it can trav

1.	A boat can travel 60 km in 3 hours while going downstream, it can travel 90 km in 5 hours while going upstream. What is the ratio of the speed of boat in still water to the speed of the stream?
A.	10 : 9
B.	4 : 1
C.	6 : 1
D.	19 : 1
Answer» E.

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A boat can travel 60 km in 3 hours while going downstream, it can travel 90 km in 5 hours while going upstream. What is the ratio of the speed of boat in still water to the speed of the stream?

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