SOLUTION: you row upstream at 3 mph and return on the same route at 6 mph. what was your average speed in mph for the whole trip?

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Question 895946: you row upstream at 3 mph and return on the same route at 6 mph. what was your average speed in mph for the whole trip?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The distance doesn't matter, and can
be any number, so I'll say it is +6+ miles
---------------
Going upstream:
+6+=+3%2At%5B1%5D+
+t%5B1%5D+=+2+ hrs
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Going downstream:
+6+=+6%2At%5B2%5D+
+t%5B2%5D+=+1+ hr
---------------
Average speed is always:
( total distance ) / ( total time )
+%28+6+%2B+6+%29+%2F+%28+2+%2B+1+%29+
+12%2F3+=+4+
The average speed is 4 mi/hr