The speed of the boat downstream of the river is 18km / h, and against 14km / h, calculate the speed of the boat in still water.

univerkov | February 19, 2021 | education

The proper speed of the boat is equal to the difference between its speed along the current and the speed of the current, as well as the sum of its speed against the current and the speed of the current.
Let’s take the flow velocity as x.
Then 18-x = 14 + x.
We get the equation.
x + x = 18-14
2x = 4
x = 2 – flow rate.
Then the speed of the boat in still water is 18-2 = 16 km / h.
Answer: the speed of the boat in still water is 16 km / h.

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