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The speed of a stream is 5 mph A boat travels 3 miles upstream in the same time it takes to travel 13 miles downstream What is the speed of the boat in still water?
Wiki User
∙ 14y ago
Speed = Distance/Time
Time = Distance/Speed
Time = 3/( s-5) = 13/(s+5)
13*(s-5) = 3*(s+5) = 3*s+15 = 13*s-65
10*s=80
s = 8;
8 mph.
Wiki User
∙ 14y ago
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