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math

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A race car driver starts along a 50-mile race course traveling at an average speed of 90 mph. Fifteen minutes later a second driver starts along the same course at an average speed of 120 mph. Will the second car overtake the first car before the drivers reach the end of the course?

  • math - ,

    First race car driver:

    time = distance / speed

    time = 50 miles / 90 mph

    time = 0.55556 x 60

    time = 33 minutes 20 seconds


    The first race car driver will took 33 minutes & 20 seconds to finish the race



    Fifteen minutes later a second race car drive start

    time = distance / speed

    time = 50 miles / 120 mph

    time = 0.41667 x 60

    time = 25 minutes

    The second race car driver will took 25 minutes to complete the 50 miles


    Now, add 25 minutes & 15 minutes = 40 minutes

    Therfore, the first race car driver will finish 6 minutes & 40 seconds before the second race car driver.

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