Mph for "The Road Trip"

So the headline news is that our average Mph for the whole whole trip is an amazing 29.75 Mph!! How cool is that!?!?!? This includes time eating, sleeping, cavorting. The whole thing. Woot!

We travelled a whopping 13,775 miles in 463 hours, 3693 of which were driven across America. Distances and times were measured from Edinburgh to Edinburgh. Working is below and hasn't been checked. Corrections will be filed in an industrial furnace.

Less cooly this also involved us chucking out something like 4837.31 Kg of Co2 per person. Serious environmental Karma damage. Oh well.

Miles in whole trip = (3665 + 590 + 55) + 3693 + (5442 + 330) = 13775
Hours in whole trip = 13 + (18 * 24) + 18 = 463
Mph over whole trip = 13775 / 463 = 29.75

Car Co2 per person on road trip =
3693 miles / 22 mpg = 167.86 Gallons
167.86 gallons * 8.87 kg of Co2 per gallon = 1488.92 Kg of Co2
1488.92 Kg / 3 people = 496.31 Kg of Co2 per person

Flight Co2 per person on road trip =
19.56 pounds of Co2 per gallon
1810 kg Co2 on way out
2531 kg Co2 on way back

Total = 496.31 + 1810 + 2531 = 4837.31 kg of Co2