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Math Help - rate of change

  1. #1
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    rate of change

    Two trains start from the same point at the same time, one going east at a rate of 40 km/h
    and the other going south at 60 km/h. Find the rate at
    which they are separating after 1 h of travel.
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  2. #2
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    What is the difference in km travelled after one hour?
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  3. #3
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    20km
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