Final answer:
To calculate the car's speed, the distance traveled (determined by odometer readings) is divided by the time taken. The car traveled 110.9 km in 1.5 hours, resulting in an average speed of 73.9 km/h, which does not match the given options.
Step-by-step explanation:
The odometer readings at the start and end of the journey are used to calculate the distance traveled by the car. We have an initial odometer reading of 63240.1 km and a final reading of 63351.0 km. To find the distance traveled, we subtract the initial value from the final value:
Distance = 63351.0 km - 63240.1 km = 110.9 km.
To find the speed of the car in km/h, we also need to know the time taken for the journey. Since the journey started at 3:00 pm and ended at 4:30 pm, it lasted for 1 hour and 30 minutes, which is 1.5 hours.
Speed (in km/h) = Distance (in km) / Time (in hours).
Speed = 110.9 km / 1.5 hours = 73.9333... km/h.
Since this calculated speed does not match any of the options given, there may have been an error in the problem or in the interpretation of the choices provided.