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10 March, 23:33

The value of a car is inversely proportional to age. If a car is worth 8100 when it is 6 years old, how old will it be when it is worth 5400?

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  1. 11 March, 03:05
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    8100/6 = 5400/x

    cross multiply

    8100x = 32400

    x = 32400/8100

    x = 4 ... 4 years old
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