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Originally Posted by MetroMPG
And dremd got it first try. Thanks for showing your work, tasdrouille.
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Great mental exercise! Here is a very similar question that I found really interesting:
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You're on a TV show and there are three doors: Door 1, 2, & 3. Behind one is a brand new car. Behind the others, nothing. You make your choice and the host opens an unchosen door that he knows is empty. He gives you the option to either stay with your original pick or change to the other unopen door.
What is the smartest choice? Stay, switch, or does it really matter?
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As for the original topic, I personally find gallons (i.e. cost) per unit time the most important. At this point in my life, what really matters is my transportation cost per week.
I like these mind questions. Here's another.
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Your are driving to Denver and you want your average speed to be 40mph. You initially take it slow and average 20mph for the first half of the distance. You suddenly realize how slow you are going and decide to speed up. How fast do you have to go for the remainder of the trip to average 40mph?
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- LostCause