The boat passed 66.15 km against the current in 4.9 hours. How long will it take for the return
| May 1, 2021 | education
The boat passed 66.15 km against the current in 4.9 hours. How long will it take for the return journey if its own speed is 16.2 km / h?
1. Find the speed of the boat against the current of the river.
66.15 / 4.9 = 13.5 kilometers per hour.
2. Determine what the speed of the river is equal to.
16.2 – 13.5 = 2.7 kilometers per hour.
3. How many kilometers per hour did the boat go downstream?
16.2 + 2.7 = 18.9 kilometers per hour.
4. Find out how long he swam the way back.
66.15 / 18.9 = 3.5 hours.
Answer: 3.5 hours.
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