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    Question

    The first part of the Franklin race determines the speed

    of 50 mph and the second part at a speed of 200 mph. Find the average speed of both parts (mph-miles per hour).
    A 75 Correct Answer Incorrect Answer
    B 65 Correct Answer Incorrect Answer
    C 70 Correct Answer Incorrect Answer
    D 80 Correct Answer Incorrect Answer

    Solution

    Average Speed =2xy/x+y = (2├Ч50├Ч200)/50+200 =20000/250 = 80.

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