The boat sailed 40 km on the lake in 2 hours. and for another 2 hours along the river 34 km.
| April 3, 2021 | education
The boat sailed 40 km on the lake in 2 hours. and for another 2 hours along the river 34 km. Determine the speed of the current.
Find the speed of the boat in still water.
We divide the distance that he traveled along the lake by the travel time.
40/2 = 20 km / h.
Determine how fast the boat was going along the river.
We divide 34 km by 2 hours.
34/2 = 17 km / h.
To determine the speed of the current, it is necessary to subtract its speed from the speed of the boat in still water when moving along the river.
As a result, we get:
20 – 17 = 3 km / h.
Answer: The speed of the river is 3 km / h.
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