The boat’s own speed is 18 km / h. The speed of the river is 2 km / h. How far does the boat sail upstream of the river in 3 hours?

The solution of the problem:
1. To solve the problem, we find the speed of the boat against the river flow, if we know the boat’s own speed and the speed of the river flow.
18 – 2 = 16 kilometers per hour.
2. Find out how far the boat sails against the river in 3 hours.
16 * 3 = 48 kilometers.
Answer: The boat will sail forty-eight kilometers upstream of the river in three hours.