The boat, the speed of which is 15 km / h, sailed 3 hours along the river and 2 hours against the river.

The boat, the speed of which is 15 km / h, sailed 3 hours along the river and 2 hours against the river. What is the distance the boat sailed if the speed of the river flow is 2 km / h

The solution of the problem:
1. Find the speed of the boat along the river.
15 + 2 = 17 kilometers per hour
2. Find out what distance the boat sailed along the river in 3 hours.
3 * 17 = 51 kilometers
3. Find out at what speed the boat was traveling against the stream of the river per hour.
15-2 = 13 kilometers
4. Find out the distance covered by the boat in 2 hours against the river.
2 * 13 = 26 kilometers
5. Let’s calculate the distance the boat sailed.
26 + 51 = 77 kilometers
Answer: The boat sailed seventy-seven kilometers.