A car starts from a city X at 7:30 hours and reaches city Y at 22:30. If the distance between the two cities is 540 kilometers, the average speed of the car is
1
36 m/s
2
10 m/s
3
24 m/s
4
20 m/s
A car starts from a city X at 7:30 hours and reaches city Y at 22:30. If the distance between the two cities is 540 kilometers, the average speed of the car is