The boat sails a distance of 106 km. 3 hours on the lake. For 2 hours he swam against the stream of the river.

The boat sails a distance of 106 km. 3 hours on the lake. For 2 hours he swam against the stream of the river. find your own speed if it is known that the speed against the stream of the river is 2 km / h.

To solve this problem, we introduce a conditional variable “X”, through which we denote the boat’s own speed. Then, according to the condition of the problem, we make the following equation: 3X + 2 (X – 2) = 106. Solving this equation, we get 3X + 2X – 4 = 106 or 5X = 110 or X = 22 kilometers per hour.
Answer: the boat’s own speed is 22 kilometers per hour.