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Red Riding Hood drives the 432 miles to Grandmother’s house in 1 hour less than it takes the Wolf to drive the same route. Her average speed is 6 mph faster than the Wolf’s average speed. How fast does Red Riding Hood drive?

 Sep 21, 2020
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R = Red's rate

R-6 = Wolf rate

 

432/R   =   432/(R-6) -1

432(R-6) = 432 R  - R(R-6)

 

Solve for R = 54 m/hr     (via Quadratic Formula after simplifying)                  Wolf = 48 m/hr

 Sep 21, 2020

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