Kiran covers a certain distance at 80 km/h and returns back to the same point at 20 km/h. Then, the average speed during the whole journey be -
1
35 km/h
2
32 km/h
3
30 km/h
4
28 km/h
Kiran covers a certain distance at 80 km/h and returns back to the same point at 20 km/h. Then, the average speed during the whole journey be -