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physic

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Hi, could you help me please
Question: A tortoise can run with a speed of 0.12 m/s and a hare can run 20 times as fast. in a race, they both start at the same time, but the hare stops to rest for 2.0 minutes. The tortoise wins by a shell (25cm).
A.How long does the race takes?
B. What is the length of race?
Thank you so much for your help.

  • physic -

    tortoise= .12 m/s
    hare= .12 x 20= 2.4m/s
    rest= 2.0 minutes= 120 seconds

    part A

    0.12 t = (2.4)(t-120 seconds)-.25

    solve for t=

    for part B
    use part A's answer and multiply by the tortoise's speed.

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