A Need For Speed

The Math Runners
Topic: Proportional Reasoning
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Rebecca and Susan live 2 miles away from each other and are getting ready for their morning jog. Rebecca leaves her house at 8:00 AM and starts jogging towards Susan's end of the street. At 8:06 AM, Susan leaves her apartment to jog towards Rebecca's end of the street. They pass each other at exactly 8:13 AM and run at a same constant speed. What is this speed, in miles per hour?

Common Core Standards: 6.RP.3
Problem #: 
117 (2017-2018)
Problem Difficulty Level: 4 [?]