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    rehupo's Avatar
    rehupo Posts: 1, Reputation: 1
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    #1

    Nov 29, 2010, 05:44 PM
    How to find the average speed?
    A man rides a bike from melbourne to Koo-wee-rup at a speed of 20km/h. He immediately comes back by train, averaging 60km/h. What is his average speed for the entire jourmey from melbourne to Koo-wee-rup and back??
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Nov 29, 2010, 11:01 PM

    Use:



    Let the distance to be x. The total distance becomes 2x.

    The time taken is given by distance divided by speed.
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