Math

The time it takes to cover the distance between two cities by car varies inversely with the speed of the car. The trip takes
3 hours for a car moving at
40 mph. How long does the trip take for a car moving at 60 mph?

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  1. d = r*t = 40 * 3 = 120 mi.

    d = 60 * T =120, T = 120/60 = 2 h.

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