Math

The time T required to drive a fixed distance varies inversely as the speed r. it takes five hours at 60 mph to drive a fixed distance. how long would it take to drive the fixed distance at 40 mph?

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  1. t = k/r, where k is a constant
    given: t = 5, r = 60
    5 = k/60
    k = 300

    t = 300/r
    when r = 40
    t = 300/40 = 7.5 hrs

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  2. Thank you so much:)

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