The speed of the boat along the river is 28.4 km / h. The speed of the river is 3.9 km / h.
| June 11, 2021 | education
The speed of the boat along the river is 28.4 km / h. The speed of the river is 3.9 km / h. Find your own speed of the boat and its speed against the current of the river.
1) Let’s find out at what speed the boat moves in still water, if it is known that its speed along the river is 28.4 km / h, and the speed of the river is 3.9 km / h.
28.4 – 3.9 = 24.5 km / h.
2) Find out at what speed the boat is moving against the current, if it is known that the speed of the boat in still water was 24.5 km / h, and the speed of the current was 3.9 km / h.
24.5 – 3.9 = 20.6 km / h.
Answer: the boat’s own speed was 24.5 km / h, and its speed upstream of the river is 20.6 km / h.
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