You can put this solution on YOUR website! You only have 2 numbers to work with.
Do you think you should add them.
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11 + 14 = 25 (minutes?)
But, if you go faster, it would take longer, so that makes no sense.
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If you subtract them, 14 - 11 = 3 (hours?). But if you go farther, it takes less time, so that won't work either.
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What's your guess? Give it a try.