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Question

An aeroplane files 400 blank m north and 300 blank m south and then files 1200 blank m upwards then net displacement is

  1. 1200 blank m  
  2. 1300 blank m  
  3. 1400 blank m  
  4. 1500 blank m  

The correct answer is: 1200 blank m


    An aeroplane files 400 blank m north and 300 blank m south so the net displacement is 100 blank m towards north
    Then it files 1200 blank m upwards so r equals square root of open parentheses 100 close parentheses to the power of 2 end exponent plus open parentheses 1200 close parentheses to the power of 2 end exponent end root
    equals 1204 blank m asymptotically equal to 1200 blank m
    The option should be 1204 blank m, because this value mislead one into thinking that net displacement is in upward direction only

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