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A ,motorboat can travel 30 km upstream a...

A ,motorboat can travel 30 km upstream and 28 km downstream in 7 h. It can travel 21 km upstream and return in 5 h. Find the speed of the boat in still water and the speed of the stream.

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To solve the problem, we need to find the speed of the motorboat in still water (u) and the speed of the stream (v). We can set up two equations based on the information given in the problem. ### Step 1: Define Variables Let: - \( u \) = speed of the boat in still water (km/h) - \( v \) = speed of the stream (km/h) ### Step 2: Set Up the Equations ...
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