Final answer:
The speed of 80 km/h converts to approximately 22.2 m/s and 49.7 mi/h, by dividing by 3.6 for m/s, and using the conversion factor of 1 km to 0.621371 miles for mi/h.
Step-by-step explanation:
Converting Speed Units
The student's question involves converting speed from one unit to another. Specifically, the speed limit of 80 km/h is to be converted to meters per second and miles per hour. First, to convert km/h to m/s, you divide by 3.6 (since 1 km equals 1000 meters and 1 hour equals 3600 seconds). Thus, 80 km/h is equal to 80 / 3.6, which is approximately 22.2 m/s. For the conversion to miles per hour, you use the fact that 1 km is approximately 0.621371 miles. Therefore, 80 km/h is roughly 49.7 mi/h. The correct answer is option B: 22.2 m/s, 49.7 mi/h.