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16 January, 19:39

You can ride a bicycle 15 mph. Your sister

rides 12 mph. You give her a one hour

head start. In how many hours will you

catch up if neither of you stops?

Make a record of how you solved this

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Answers (1)
  1. 16 January, 20:02
    0
    4

    Step-by-step explanation:

    Find the LCM of 12 and 15.

    LCM = 60.

    Now divide the LCM by the two numbers.

    60/12 = 5, 60/15 = 4.

    As the sister got an hour head start, subtract one.

    5-1=4.

    Therefore it will be 4 hours.
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