jenni-m

Let's do another comparison.

(I'll show how to do the formula in case others want to check their mileage vs. time)
You can do distance / speed * 60
Or distance / (speed / 60)
I'm not sure which one is better, but they are close. Whatever is easier.

I'll do this the quicker way.
Let's say someone drives to work 25 miles at 55 mph, 5 days a week, every week for a year.

25 / 55 * 60 = 27.27 minutes. We multiply this by 2 because he has to get home also. 27.27 * 2 = 54.55 minutes

54.55 * 5 * 52 = 14183
14183 / 60 / 24 = 10 days travel time going to and from work, per year.

Now we will look at what happens if he travels at 75 mph

25 / 75 * 60 * 2 * 5 * 52 / 60 / 24 = 7.22 days spent going to and from work per year.

Edit, its probably more accurate without partial days? So just 52 weeks will do (I changed it just now). But the answers are still close enough either way you do it.