The motor boat covered 15 km along the river and returned back, spending 8 hours for the entire journey.
| December 5, 2020 | education
The motor boat covered 15 km along the river and returned back, spending 8 hours for the entire journey. The river’s speed is 1 km / h. Find the speed of the boat in still water.
X-boat speed
X + 1-boat speed downstream
X-1-speed boat against the current
15: (x + 1) – travel time to the city
15: (x-1) – travel time out of town
15: (x + 1) +15: (x-1) = 8
x = 4
Answer: 4
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