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Question

The length of a rectangular plate is measured by a meter scale and is found to be 10.0 cm. Its width is measured by vermier callipers as 1.00 cm. The least count of the meter scale and varmier callipers are 0.1cm and 0.01cm respectively (Obviously). Maximum permissible error in area measurement is

  1. ±0.2 cm2    
  2. ±0.1 cm2    
  3. ±0.3 cm2    
  4. Zero    

The correct answer is: ±0.2 cm2

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