What's the average of 5 MPG and 10 MPG?
The math isn't quite obvious to me, but if you go out camping and get 5 MPG on the way to the campground and turn around and get 10 MGP on the way back, your average MPG won't be 7.5 as you would expe...
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Actually that isn't quite right but very close. In point of fact you'll get your best fuel mileage going east because you'll also get the speed of the earth's rotation too. :)
