How many kilometers will a motor boat travel in 4 hours, moving against the flow of the river, if its own speed
| May 29, 2021 | education
How many kilometers will a motor boat travel in 4 hours, moving against the flow of the river, if its own speed is 22 km / h, and the speed of the current is 5/44 of the boat’s own speed?
In 4 hours the boat will pass against the stream
4 • (22000 – 22000: 44 • 5) = 4 • (22000 – 2500) = 4 • 19500 = 78000 (m) = 78 (km).
Answer: 78 km.
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