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A fisherman travels downstream at full speed to his favorite fishing spot. The stream is running at a rate of 5 miles per hour, and he takes an hour to get to the fishing hole. He catches 5 fish and calls it a day. He takes twice as long at full speed to get back to the dock going against the current. How fast will his fishing boat go?

Respuesta :

A fisherman travels downstream at full speed to his favorite fishing spot. 
The stream is running at a rate of 5 miles per hour, and he takes an hour to get to the fishing hole. 
He catches 5 fish and calls it a day. 
He takes twice as long at full speed to get back to the dock going against the current. 
(x + 5)/(x - 5) = 2 
x = 15 
The full speed of the fishing boat is 15 miles per hour.

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