The speed of the boat in still water is 16.7 km / h, and the speed of the river is 2.3 km / h. The boat went 2 hours along the river

| February 10, 2021 | education

The speed of the boat in still water is 16.7 km / h, and the speed of the river is 2.3 km / h. The boat went 2 hours along the river, and then turned back and walked for another 3 hours. How many kilometers did the boat go?

1) Find the speed of the boat along the river. It is necessary to add the speed of the river to your own speed.

16.7 + 2.3 = 19 (km / h).

2) Find the speed of the boat against the current of the river. It is necessary to subtract the speed of the river from its own speed.

16.7 – 2.3 = 14.4 (km / h).

3) Find the distance traveled by the boat along the river in 2 hours. To find the distance, you need to multiply the speed by time.

19 * 2 = 38 (km).

4) Find the distance traveled by the boat against the river in 3 hours.

14.4 * 3 = 43.2 (km).

5) Find the distance traveled by the boat during the entire movement.

38 + 43.2 = 81.2 (km).

Answer. 81.2 kilometers.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.