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A car covers four successive 7 km distances at speeds of 10 km/hour, 30 km/hour, 60 km/hour respectively, Its average speed over this distance is

1)20 km/hour

2)60 km/hour

3)30 km/hour

4)40 km/hour

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  • Exam: SSC CGL 2015 Tier 2 Quantitative Questions and Answer Key

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