The speed of the river is 10 km / h. and the own speed of the motor boat is 20 km / h. How far a motor boat will
| July 6, 2021 | education
The speed of the river is 10 km / h. and the own speed of the motor boat is 20 km / h. How far a motor boat will travel in 5 hours. moving against the stream? How long will it take for a motor boat to travel 26 km / h with the flow.
The motor boat’s own speed is 20 km / h, and the river speed is 10 km / h, which means that the boat will pass against the river in 5 hours:
(20 – 10) * 5 = 50 km.
With the current, the motor boat will move at a speed:
20 + 10 = 30 km / h.
With such a speed, a motor boat will spend 26 km of the way:
26:30 = 13/15 hours = 52 minutes.
Answer: 50 km; 52 minutes.
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