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On a journey across Bombay, a tourist bu...

On a journey across Bombay, a tourist bus averages 10 km/h for 20% of the distance, 30 km/h for 60% of it and 20 km/h for the remainder. The average speed for the whole journey was

A

10 km/h

B

30 km/h

C

5 km/h

D

20 km/h

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The correct Answer is:
D
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