A car is moving around a square-shaped park with different speeds on each side, if the speed is 30 kmph, 20kmph, 15 kmph and 10 kmph respectively. Then find the average speed of the car for one complete round.
1
14 kmph
2
15 kmph
3
16 kmph
4
17 kmph
5
None of the above/More than one of the above