Question 440730: If you travel to work at 30mph and go home by 40 mph, what is your average rate for the entire trip?
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! If you travel to work at 30mph and go home by 40 mph, what is your average rate for the entire trip?
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I worked this previously, and it's similar to parallel resistors, but 2 times that.
Avg = 2*30*40/(30+40) = 2400/70
= 240/7 mph
=~ 34.28 mph
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It's always less than the avg of the 2 speeds, because more time is spent going at the slower speed.
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