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    201002730 Posts: 1, Reputation: 1
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    #1

    Mar 5, 2010, 01:31 AM
    Grade 11 algebra
    A farmer travels in a 180kilometre distance to pretoria in a loaded truck. On his way back to the farm he travels at 30kilometre per hour and he saves 1 hour in an unloded truck, determine his speed while travelling to pretoria?
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    galactus Posts: 2,271, Reputation: 282
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    #2

    Mar 6, 2010, 02:48 AM

    The distances to and fro are the same.

    The distance is d=rt

    To Pretoria we have 180=rt

    Coming back he it take 1 hour less time. 180=30(t-1)

    Solve for t and r.
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