The time it takes to cover the distance between two cities by car varies inversely with the speed of the car. The trip takes 7 hours for a car moving at 27 mph. How long does the trip take for a car moving at 63 mph ?
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Since the time varies inversely with the speed, we can write the relationship as $t = \frac{k}{s}$, where $k$ is the constant of proportionality. Show more…
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