A boat travels 64 km downstream in 4 hours and 24 km upstream in 4 hours. Let x be the speed of the boat in still water and y the speed of the stream (in km/h). Find x (the speed of the boat in still water).

Question

Accepted Answer

11 km/h. Downstream: x + y = 64/4 = 16. Upstream: x - y = 24/4 = 6. Adding: 2x = 22, x = 11 km/h.

A boat travels 64 km downstream in 4 hours and 24 km upstream in 4 hours. Let $x$ be the speed of the boat in still water and $y$ the speed of the stream (in km/h). Find $x$ (the speed of the boat in still water).

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