SOLUTION: blake travels in a boat 200 miles downstream in the same time that it takes to go 120 miles upstream. If the speed of the stream is 5 mph, find the speed of the boat in still water
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-> SOLUTION: blake travels in a boat 200 miles downstream in the same time that it takes to go 120 miles upstream. If the speed of the stream is 5 mph, find the speed of the boat in still water
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Question 186460: blake travels in a boat 200 miles downstream in the same time that it takes to go 120 miles upstream. If the speed of the stream is 5 mph, find the speed of the boat in still water Answer by checkley77(12844) (Show Source):
You can put this solution on YOUR website! 200/(X+5)=120/(X-5)
120(X+5)=200(X-5)
120X+600=200X-1,000
120X-200X=-1,000-600
-80X=-1,600
X=-1,600/-80
X=20 MPH. IS THE SPEED OF THE BOAT IN STILL WATER.
PROOF:
200/(20+5)=120/(20-5)
200/25=120/15
8=8
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