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A person can row a boat at the rate of 5 km/hour in still water. He takes thrice as much time in going 40 km upstream as in going 40 km downstream. Find the speed of the stream.

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To solve the problem step by step, we will use the information provided in the question regarding the speed of the boat in still water, the distances traveled, and the relationship between the time taken upstream and downstream. ### Step 1: Define Variables Let: - \( r \) = speed of the stream (in km/hour) - The speed of the boat in still water = 5 km/hour ### Step 2: Determine Speeds Upstream and Downstream ...
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