The speed of the motor boat against the current is 11.5 km / h, and the speed with the current is 20% higher

The speed of the motor boat against the current is 11.5 km / h, and the speed with the current is 20% higher than the speed against the current. Find the speed of the river.

The solution of the problem:
1. Let’s find by how many kilometers per hour the speed of a motor boat along the river is greater than against the river.
11.5 * 20/100 = 2.3 kilometers.
2. Find the speed of the boat along the river.
11.5 + 2.3 = 13.8 kilometers.
3. Find out the speed of the river.
(13.8 – 11.5) / 2 = 1.15 kilometers.
Answer: The speed of the river is one kilometer and one hundred and fifty meters per hour.