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You go for a bike ride. You ride your bike straight at 10 miles-per-hour for 90 minutes.You then turn around to travel back to your original starting point. If it takes you 2 hours to get back, what was your average speed on your way back?

 Feb 22, 2021
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10mph for 90 minutes = 10 x 1.5 = 15 miles

This means that it took 2 hours to bike 15 miles. This means you're going at 7.5mph

 Feb 22, 2021

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