The speed of the boat along the river is 5 m / s, and upstream is 3 m / s. Find the speed of the river and the average speed of the boat.
| December 11, 2020 | education
Boat speed – x
River flow speed – y
Downstream speed = x + y
Upstream speed = x – y
Let’s compose a system of equations:
x + y = 5
x-y = 3
x + y + x-y = 5 + 3
2x = 8
x = 4 km / h
4-y = 3
y = 1 km / h
Answer: own speed of the boat = 4 km / h, river speed = 1 km / h
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