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Mark and Trisha are traveling in the same direction and Mark is going 16 miles per hour. Trisha is going 12 miles per hour but started 8 miles before Mark. When will they meet up?

 Aug 29, 2021
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The closing speed between Mark and Trisha  is   16-12 = 4 m/hr      It will take Mark:  8 miles / 4 mi/hr = 2 hrs to catch up.

 Aug 29, 2021

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