This question tests knowledge of the speed formula: speed = distance / time.
Use Speed = Distance ÷ Time. Check units.
Speed measures how fast something moves. It is calculated as distance divided by time. For example, if a car travels 180 km in 2 h, speed = 180 ÷ 2 = 90 km/h. Students should ensure distance and time are in compatible units. Understanding speed is essential in physics, everyday travel planning, and problem-solving.