Calislays12 Calislays12 04-02-2021 Chemistry contestada John roller skates 48 km in 3 hours. What is his average speed in kilometers per hour? A. 16 miles per hour. B. 1.6 km/hr. C. 16.5 km/hr west. D. 16 km/hr. Hurrrryyyyyy like I need it rn❤️