Final answer:
The standard speed limit in built-up areas is 50 km/h, which is a safe speed for residential areas to ensure pedestrian safety. Converting speeds between km/h, m/s, and mi/h can help understand and compare speed limits internationally.
Step-by-step explanation:
The maximum speed limit allowed in cities, towns, villages, and built-up areas unless otherwise posted is typically 50 km/h. This speed is considered safe for residential zones to minimize accidents and protect pedestrians. When crossing the road, it's essential that you can walk a distance of at least 4 meters before a car traveling at this speed limit reaches you, to ensure you cross safely.
Converting speeds between units is a useful skill. For example, 100 km/h is equivalent to approximately 27.78 m/s or about 62 mi/h. These conversions are valuable for understanding and comparing speed limits in different regions or countries.