The speed of the river is 6 km / h. The speed of the boat is 18 km / h. How much is the speed of the boat
| August 22, 2021 | education
The speed of the river is 6 km / h. The speed of the boat is 18 km / h. How much is the speed of the boat behind the current greater than its speed against the current?
Method 1.
Determine the speed of the boat along the river and against it.
18 + 6 = 24 km / h (downstream).
18 – 6 = 12 km / h (upstream).
The difference in speed of the boat will be:
24 – 12 = 12 km / h.
Method 2.
To find out how much the speed with the current is higher than the speed against it, multiply the indicated speed of the river flow by 2 directions.
6 * 2 = 12 km / h.
Answer:
At 12 km / h.
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