A motor-boat goes 2 km upstream in a stream flowing at 3 km per hr. and then returnsdownstream to the starting point in 30 minutes. Find the speed of the motor-boat in still water.

A motor-boat goes 2 km upstream in a stream flowing at 3 km per hr. an

1.	A motor-boat goes 2 km upstream in a stream flowing at 3 km per hr. and then returns downstream to the starting point in 30 minutes. Find the speed of the motor-boat in still water.
A.	9.5 kmph
B.	8.5 kmph
C.	9 kmph
D.	8 kmph
Answer» D. 8 kmph

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A motor-boat goes 2 km upstream in a stream flowing at 3 km per hr. and then returnsdownstream to the starting point in 30 minutes. Find the speed of the motor-boat in still water.

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A motor-boat goes 2 km upstream in a stream flowing at 3 km per hr. and then returns
downstream to the starting point in 30 minutes. Find the speed of the motor-boat in still water.