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However, miles per gallon makes other calculations easier. As for instance I know I get 70 mpg, and my tank holds 10.5 gallons. So if I'm driving through the middle of Nevada, the gauge show half full, and I see a "Next Gas 175 Miles" sign, do I turn back and fill up at Bandito Gas, the only pump for 100 miles? Or do I drive on, confident in the simple 70 mpg times 5 gallons - 350 miles calculation?
As for the puzzler, its best use is to show the value of out-of-the-box thinking, especially if you're an auto manufacturer. Rather than spend that bailout money on marginal improvements to SUV mpg, you switch your advertising budget to promoting small, fuel-efficient cars.
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