The motor boat sailed for 2 hours along the river and 3 hours against the current. The own speed of the motor boat is 19.5

The motor boat sailed for 2 hours along the river and 3 hours against the current. The own speed of the motor boat is 19.5 km / h, the speed of the river is 2.8 km / h. How far has the powerboat sailed?

First, let’s find out what the speed of the motor boat was along the river, if its own speed is 19.5 km / h:
19.5 + 2.8 = 22.3 km / h.
Now let’s determine how far the motor boat traveled along the river, if, according to the condition of the problem, it is known that it sailed along the river for 2 hours:
S = V * T, where V is speed, T is time.
S = 2 * 22.3 = 44.6 km.
Next, we find what the speed is equal to against the flow of the river:
19.5 – 2.8 = 16.7 km / h.
Let’s calculate how far the boat traveled against the stream of the river:
S = V * T, where V is speed, T is time.
S = 2 * 16.7 = 50.1 km.
It remains to find how far the boat traveled:
44.6 + 50.1 = 94.7 km.
Answer: the motor boat sailed 94.7 km.