One third of a certain journey is covered at the speed of 80 km/hr, one fourth of the journey at the speed of 50 km/hr and the rest at the speed of 100 km/hr. what will be the average speed (in km/hr) for the whole journey?
1
75
2
67
3
66.66
4
76.66
One third of a certain journey is covered at the speed of 80 km/hr, one fourth of the journey at the speed of 50 km/hr and the rest at the speed of 100 km/hr. what will be the average speed (in km/hr) for the whole journey?