Find the speed of the river flow, if in 5 hours. the boat went downstream for 96.5 km
| January 29, 2021 | education
Find the speed of the river flow, if in 5 hours. the boat went downstream for 96.5 km, and in 4.8 hours. against the stream – 81.6 km.
1. Let’s calculate the speed of the boat along the river, if it is known that it covered 96.5 kilometers in 5 hours.
96.5 / 5 = 19.3 kilometers.
2. Find out at what speed the boat went against the river flow per hour, if it is known that it covered 81.6 kilometers in 4.8 hours.
81.6 / 4.8 = 17 kilometers.
3. Find how many kilometers per hour the speed of the river.
(19.3 – 17) / 2 = 1.15 kilometers.
Answer: The speed of the river is 1.15 kilometers per hour.
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