Final answer:
The speed of the car is 60 km/h.
Step-by-step explanation:
To calculate the speed of the car, we divide the distance traveled by the time taken. In this case, Rama covered a distance of 420 km in 7 hours, so the speed was 420 km / 7 hours = 60 km/h. Therefore, option B) 60 km/h is the correct answer.
Learn more about Speed of a car