A motorboat can travel at 5 km/hr in still water. It travelled 90 km downstream in a river and then returned, taking altogether 100 hours. Find the rate of flow of the river.

A motorboat can travel at 5 km/hr in still water. It travelled 90 km

1.	A motorboat can travel at 5 km/hr in still water. It travelled 90 km downstream in a river and then returned, taking altogether 100 hours. Find the rate of flow of the river.
A.	3 kmph
B.	3.5 kmph
C.	2 kmph
D.	4 kmph
Answer» E.

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A motorboat can travel at 5 km/hr in still water. It&nbsp;travelled&nbsp;90 km downstream in a river and then returned, taking altogether 100 hours. Find the rate of flow of the river.

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A motorboat can travel at 5 km/hr in still water. It travelled 90 km downstream in a river and then returned, taking altogether 100 hours. Find the rate of flow of the river.