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      Question

      An aeroplane rises

      because 
      A Of upward reaction of air. Correct Answer Incorrect Answer
      B The density of air above the plane is less than below it. Correct Answer Incorrect Answer
      C the pressure above its wings is less than the pressure below them Correct Answer Incorrect Answer
      D Its nose points upwards. Correct Answer Incorrect Answer

      Solution

      An aeroplane rises because the pressure above its wings is less than the pressure below them. 

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