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March 29, 2017

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If a hiker walks trail B (1 mile in length) at 6 mph and trail C (3 mils in length) at 2 mph, what is the hiker's overall average speed, in mph, for hiking on the two trails?

  • math - ,

    time for trail B = 1/6 hrs
    time for trail C = 3/2 hrs

    total time = 1/6 + 3/2 = 5/3 hrs

    avg speed = total distance / total time
    = 4/(5/3) = 4(3/5) = 12/5 mph or 2.4 mph

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