SOLUTION: A boat goes 6 miles per hour in still water. It takes as long to go 40 miles upstream as it does to go 80 miles downstream. Find the speed of the current.

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Question 111855This question is from textbook Beginning Algebra
: A boat goes 6 miles per hour in still water. It takes as long to go 40 miles upstream as it does to go 80 miles downstream. Find the speed of the current. This question is from textbook Beginning Algebra

Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
40/(6-C)=80/6+C) NOW CROSS MULTIPLY
40(6+C)=80(6-C)
240+40C=480-80C
+40C+80C=480-240
120C=240
C=240/120
C=2 MPH FOR THE CURRENT.
PROOF
40/(6-2)=80(6+2)
40/4=80/8
10=10