A boat can travel 15 km downstream in 30 minutes. If the speed of the stream is 5 km/h, find the speed of the boat in still water.

Topic: Speed, Time &amp; Distance
Subtopic: Boats and Streams

A20 km/h

B25 km/h

C30 km/h

D35 km/h

Explanation

Downstream speed = 15 km / 0.5 h = 30 km/h. Downstream speed = Boat speed + Stream speed => 30 = Boat speed + 5 => Boat speed = 25 km/h.

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