A train travels at a speed of 30 km/hr for 12 minutes and at a speed of 45 km/hr for the next 8 minutes. The average speed of the train for this journey is :

A train travels at a speed of 30 km/hr for 12 minutes and at a speed o

1.	A train travels at a speed of 30 km/hr for 12 minutes and at a speed of 45 km/hr for the next 8 minutes. The average speed of the train for this journey is :
A.	0 km/hr
B.	6 km/hr
C.	7.5 km/hr
D.	8 km/hr
Answer» C. 7.5 km/hr

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A train travels at a speed of 30 km/hr for 12 minutes and at a speed of 45 km/hr for the next 8 minutes. The average speed of the train for this journey is :

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