This question tests knowledge of units for speed. Speed units measure distance per unit time, e.g., km/h, m/s, mph.
Focus on units that divide distance by time.
Speed is a measure of how fast an object moves. Common units include km/h, m/s, and mph. Recognizing the correct units for a given quantity is important in calculations and real-world applications. Density (g/cm³) does not measure speed. Practice identifying correct units in physics and mathematics problems to improve accuracy and understanding.