Final answer:
After calculating their respective speeds, it is found that the bus's speed is approximately 46.67 km/h, higher than the car's speed of 39 km/h. Therefore, the bus is running faster, and the car is running slower.
Step-by-step explanation:
To determine which vehicle is running faster, we must first find the speed of each vehicle. Speed is calculated as the distance traveled divided by the time taken. For the car, the speed is 156 km / 4 hours = 39 km/h. For the bus, the speed is 140 km / 3 hours = approximately 46.67 km/h. Comparing these speeds, we can conclude that:
- (a) The bus is running faster than the car.
- (b) The car is running slower than the bus.
- (c) They are not running at the same speed.
- (d) None of the above does not apply as we have clear answers for (a) and (b).