SOLUTION: If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively are ___________ ___? I h
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Question 61006: If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively are _______________? I have the answers, but want to know how to work it out, thanks. Answer by checkley71(8403) (Show Source):
You can put this solution on YOUR website! DISTANCE=RATE*TIME
72=3R OR R=72/3 OR R=24 MPH DOWNSTREAM
60=6R OR R=60/6 OR R=10 MPH UP STREAM
TO FIND THE CURRENT WE ONLY NEED TO FIND 1/2 THE DIFFERENCE IN THE TWOSPEEDSUP & DOWN STREAM THUS (24-10)/2=14/2=7 MPH FOR THE CURRENT
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