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7 July, 16:16

An elevator starts on the 100th floor of an building. It descends 4 floors every 10 seconds. At what floor will the elevator be at within 60 seconds?

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  1. 7 July, 16:23
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    The elevator goes 4 floors every 10 seconds.

    That means that in 60 seconds the evaluator will go (4 floors) (6) = 24 floors.

    Therefore since it starts at 100 and goes down 24 floors you do 100-24=76
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