Question

# A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is:

Medium

## Solution

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Correct option is A)

## Let the speed of the stream be Speed downstream Speed upstream Distance travelled downstream Distance travelled upstreamTime upstreamTime upstream Time downstreamTime downstreamTotal time taken Hence the correct option is (B).

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