A boy runs 1.5 km in 45 minutes. What is his speed in kilometers per hour?
Thoughts? Step-by-step reasoning:
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Since 1 hour is equal to 60 minutes, then 45 minutes is equal to 45 / 60 = 0.75 hours. Then, the speed in kilometers per hour is 1.5 km / 0.75 hour = 2 kilometers per hour.
Thus, the answer is 2.
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