SOLUTION: The time required to drive a fixed distance varies inversely as the speed r. It takes 5 hr at a speed of 80km/h to drive a fixed distance. How long will it take to drive the same
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Question 42848: The time required to drive a fixed distance varies inversely as the speed r. It takes 5 hr at a speed of 80km/h to drive a fixed distance. How long will it take to drive the same distance ata speed of 70km/h? Answer by fractalier(6550) (Show Source):
You can put this solution on YOUR website! The equation for this inverse relation is
t = k/r
Now plug in to find k...
5 = k/80
k = 400
Now rewrite it using the new k and plug in the new data...
t = 400/r
t = 400/7 hrs or 57 1/7 hours
