Find the boat’s own speed if the path of 30 km was covered with the current in 2 hours, and against the current in 3 hours.

Let’s find out how fast the boat was going along the river.

We divide the traversed path by time.

30/2 = 15 km / h.

Determine its speed in the opposite direction.

Divide 30 km by 3 hours.

30/3 = 10 km / h.

The boat’s own speed is the arithmetic mean of its speed in each direction, so we get:

(15 + 10) / 2 = 25/2 = 12.5 km / h.

Answer: The boat’s own speed is 12.5 km / h.

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