The speed of the motor boat along the river is 23 km / h, and against the current 17 km / h.
| September 1, 2021 | education
The speed of the motor boat along the river is 23 km / h, and against the current 17 km / h. Find the current speed and the boat’s own speed.
In order to find the boat’s own speed, it is necessary to divide the sum of the speeds of the motor boat in two directions by 2.
We get:
(17 + 23) / 2 = 40/2 = 20 km / h.
We determine the speed of the river flow in one of two ways.
We subtract its own speed from the speed of the boat along the river:
23 – 20 = 3 km / h.
We subtract from the motor boat’s own speed its speed upstream of the river.
20 – 17 = 3 km / h.
Answer:
3 km / h and 20 km / h.
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