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Solve each of the following variation problems by setting up a formula to express the relationship, finding the constant, and then answering the question. Problem:

Solve each of the following variation problems by setting up a formula to express the relationship, finding the constant, and then answering the question.

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The time required to drive a fixed distance varies inversely as the speed. It takes 5 hr at a speed of 80 km/h to drive a fixed distance. How long will it take to drive the same distance at a speed of 70 km/h?

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