What is the average speed of a car which covers half the distance with a speed of 28 km/h and the other half with a speed of 84 km/h?
1
43km/h
2
39km/h
3
38km/h
4
42km/h
What is the average speed of a car which covers half the distance with a speed of 28 km/h and the other half with a speed of 84 km/h?