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?

Question

Mathematics

Cecelia Bartlett

4 April, 01:27

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?

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Amya Sharp · 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.