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Q. A car covers four successive 7 km distances at speeds of 10 km/hour, 20 km/hour, 30 km/hour and 60 km/hour respectively. Its average speed over this distance is ?

  • (A) 30 km/hour
  • (B) 20 km/hour
  • (C) 60 km/hour
  • (D) 40 km/hour
  • Correct Answer - Option(B)
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