SOLUTION: A river tour bus can travel 10 miles upstream in the same time it takes to travel 15 miles downstream. If the rivers current is 2mph what is the boats average speed in still water?

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Question 890419: A river tour bus can travel 10 miles upstream in the same time it takes to travel 15 miles downstream. If the rivers current is 2mph what is the boats average speed in still water?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
A river tour bus can travel 10 miles upstream in the same time it takes to travel 15 miles downstream. If the rivers current is 2mph what is the boats average speed in still water?
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let x=speed of boat in still water
x+2=speed of boat downstream
x-2=speed of boat upstream
..
travel time=distance/speed
15%2F%28x%2B2%29=10%2F%28x-2%29
15(x-2)=10(x+2)
15x-30=10x+20
5x=50
x=10
boats average speed in still water=10 mph