What is the maximum speed limit on ordinary roadways in residential areas?
Answer: B — 25 mph.
In residential areas, the maximum speed limit is typically 25 miles per hour. This is because residential areas are designed for safe and local traffic, and lower speed limits help to reduce the risk of accidents and protect pedestrians and other vulnerable road users. Therefore, options A, C, and D are incorrect as they exceed the appropriate speed limit for residential areas and could potentially increase the risk of accidents.