Question

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?

Answer 1

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.