On a good day, Quinn rides her bike to work at 8 miles per hour and it takes her 15 minutes. On a bad day, Quinn takes 20 minutes to ride to work. How many miles per hour does Quinn ride on a bad day?
Input the number of miles per hour in digit form into Certitude to reveal the cache coordinates.
*This puzzle cache is based on a cache in Texas created and hidden by DFW Challenger, who gets credit for the puzzle idea.
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