A boy runs 1.5 km in 45 minutes. What is his speed in kilometers per hour? Give me reasons, before answering the question
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. So the final answer is 2.