Two points A and B are situated 60 km apart on a straight road. A vehicle travels from A to B in 3 h. It then halts for 1 h and takes 2 h to come back from B to A. Find the average speed of the whole journey.

25 km/h

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24 km/h

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10 km/h

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20 km/h

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Solution

The correct option is D 20 km/h

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