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Q:

A racing car going at an average speed of 108 km/ hr takes 15 minutes to complete a lap on a racing track. By how much should it increase its speed (in km/hr) to complete the lap in 12 minutes?

  • 1
    24
  • 2
    21
  • 3
    27
  • 4
    30
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Answer : 3. "27"

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