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?

One third of a certain journey is covered at the speed of 80 km/hr, on

1.	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?
A.	75
B.	67
C.	66.66
D.	76.66
Answer» B. 67

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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?

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