A boat in still water floats at a speed of 4 m / s, and in a river downstream – at a speed of 5 m / s relative to the shore.

univerkov | November 27, 2020 | education

A boat in still water floats at a speed of 4 m / s, and in a river downstream – at a speed of 5 m / s relative to the shore. Find the speed of the river.

If without a current it floats 4 m / s, and when a co-directional current appears, the speed of the boat increases by only one meter per second, it is logical to assume that the speed of the river’s current is 1.
Vcon. – Vstart. = Vreki
5 m / s – 4 m / s = 1 m / s
Answer: 1 m / s

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