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math

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You and a friend are biking in opposite directions starting from the same point. You travel 108 feet every 8 seconds. Your friend travels 63 feet every 6 seconds.
How far apart are you and your friend after 15 minutes?

  • math - ,

    You:
    108/8 = 13.5 feet a second
    13.5 * 15 * 60 = 12,150 feet

    Friend:
    63/6 = 10.5 feet a second
    10.5 * 15 * 60 = 9,450

    12,150 + 9,450 = ?

  • math - ,

    21,600

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