A bus covers three successive 3 km stretches at speed of 10 km/hr, 20 km/hr and 60 km/hr respectively. Its average speed over this distance is :

A bus covers three successive 3 km stretches at speed of 10 km/hr, 20

1.	A bus covers three successive 3 km stretches at speed of 10 km/hr, 20 km/hr and 60 km/hr respectively. Its average speed over this distance is :
A.	0 km/hr
B.	5 km/hr
C.	8 km/hr
D.	0 km/hr
Answer» D. 0 km/hr

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A bus covers three successive 3 km stretches at speed of 10 km/hr, 20 km/hr and 60 km/hr respectively. Its average speed over this distance is :

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