Question 764768: Captain America and the Hat
Captain America was on vacation at a cabin along the Columbia River. One day Captain America decided to rent a rowboat and go for a ride on the river. Because Captain America was on vacation and was not wearing his superhero costume, he was instead wearing his old Tilley hat. After rowing upstream for exactly one mile the wind kicked up and blew Captain America’s hat into the water, where it began floating downstream. This was a very calm stretch of the river and there were no rocks or rapids along the stretch where Captain America was rowing.
Thinking that the hat was old and he didn’t want it anymore, Captain America continued rowing upstream. However, after 10 minutes of rowing he remembered that he had left his secret decoder ring in the inside pocket of the hat, so he changed direction and began rowing downstream at exactly the same intensity with which he had been rowing upstream. He caught up with his hat at the dock where he had put the boat in the water.
How fast was the current moving?
Answer by ankor@dixie-net.com(22740)   (Show Source):
You can put this solution on YOUR website! After rowing upstream for exactly one mile the wind kicked up and blew
Captain America’s hat into the water, where it began floating downstream.
Captain America continued rowing upstream.
However, after 10 minutes of rowing he remembered that he had left
his secret decoder ring in the inside pocket of the hat, so he changed
direction and began rowing downstream at exactly the same intensity
with which he had been rowing upstream.
He caught up with his hat at the dock where he had put the boat in
the water.
How fast was the current moving?
:
The boat and the hat are in the same moving water so the current does
not affect their relationship. If he rowed for 10 min away, it will take
him 10 min to row back to the hat, however the their frame of ref
traveled 1 mile in this 20 min time, therefore
1 mi in 20 min = 3 mph, the speed of the current
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