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23 April, 06:02

The Jung family travels 300 km to a relative's home. The distance, d, in kilometres, varies directly with the time, t, in hours.

a) Find an equation relating d and t if d=144 when t=1.5. What does the constant of variation represent?

b) Use the equation to determine how long it will take the Jungs to reach their destination.

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  1. 23 April, 08:51
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    The distance, d, in kilometers, varies directly with the time, t, in hours.

    d = Kt

    K is the constant of proportionality.

    K = d/t

    a) K = 144/1.5

    = 96 Km/h

    K shows the speed.

    b) t = d/K

    = 300/96

    t = 3.125 hours
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