# A motor boat travels along the river the distance between two points (in both directions) in 14 hours.

A motor boat travels along the river the distance between two points (in both directions) in 14 hours. What is this distance if the speed of the boat in still water is 35 km / h and the speed of the river is 5 km / h?

To begin with, let’s calculate how much the boat passes in total upstream and downstream in 1 hour.
We take into account that in the upward movement the river gives a resistance of 5 km / h, and downward adds 5 km / h, then we get:
(35 + 5) + (35-5) = 70km
We know that the boat sailed there and back for 14 hours, so we have:
(70 * 14 hours) / 2 = 490 km distance between points

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