A paddle boat can move at a speed of 14 km/h in still water.? - river paddle boat for sale
A rowing boat is at a speed of 14 km / h to stay in quiet waters. The boat is 18 kilometers downriver paddling in a river at the same time, the steps to 9 km. What is the speed of the river?
Saturday, December 5, 2009
River Paddle Boat For Sale A Paddle Boat Can Move At A Speed Of 14 Km/h In Still Water.?
1 comment:
Leaving the speed kmh River V
Distance = Speed * Time
Time is needed for both trips,
Distance / speed is the same for the journey
Sun 18 / (14 + v) = 9 / (14-V)
or (14 + v) / (14-V) = 2
or 14 V + = 28 - 2v
or 3y = 14
for v = 14 / 3 = 4 2 / 3 km / h
Answer: the speed of the river = 4 2 / 3 km / h
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