The boat’s speed upstream of the river is 18 km / year, and its own speed is 20
| June 21, 2021 | education
The boat’s speed upstream of the river is 18 km / year, and its own speed is 20 km / year. Find the speed of the river, and the speed of the boat downstream.
1) Determine the speed of the river if we know that the boat is moving along the river at a speed of 18 km / h, and its own speed is 20 km / h.
20 – 18 = 2 km / h.
2) We find out what speed the boat develops while moving along the river, if we know that the speed of the boat in still water is 20 km / h, and we found out the speed of the river and it was 2 km / h.
20 + 2 = 22 km / h.
Answer: the speed of the river flow was 2 km / h, and downstream the boat develops a speed of 22 km / h.
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