OK well here is the basic equation and facts. btw it's a story prob.
There is a man who's in a canoe. He has a bottle setting on the front of the boat. He is going against the current. When he comes upon a bridge, he slows down. While passing under it the bottle falls into the river. The man continues to just keep going. After 30 minutes he realizes that the bottle is missing so he turns around and goes downstream towards it. When he finally catches up with the bottle, he grabs it. The bottle is 1 mile from the where it fell off of the bridge. Here is the question. What is the exact velocity of the water? (Hint:Using English system will be easiest.) Have fun with it.
When you finally get the ans
PM me with it. I'll post if u got it write on here.
It took me about 5 hours to solve it. Have fun with this conundrum.