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...
Forum Discussion
The correct calculation is:
X=((M1 + M2)/(G1 + G2))
M1 is the miles driven on the first leg; M2 is the miles driven on the second
G1 is gallons used on the first leg; G2 is gallons used on the second
So, if you went 200 miles on 40 gallons and then 200 miles on 20 gallons, you would have 5mpg for the first leg and 10mpg for the second leg, and the combined mpg would be:
X = ((200+200)/(40+20))
X = (400/60)
X = 6.6667
X=((M1 + M2)/(G1 + G2))
M1 is the miles driven on the first leg; M2 is the miles driven on the second
G1 is gallons used on the first leg; G2 is gallons used on the second
So, if you went 200 miles on 40 gallons and then 200 miles on 20 gallons, you would have 5mpg for the first leg and 10mpg for the second leg, and the combined mpg would be:
X = ((200+200)/(40+20))
X = (400/60)
X = 6.6667
