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A metal tape gives correct measurement at 15 to the power of ring operator end exponent C. It is used to measure a distance of 100 m at 45 to the power of ring operator end exponent C. The error in the measurement, if alpha equals 12 cross times 10 to the power of negative 6 end exponent divided by 1 to the power of 0 end exponent C is

  1. 36 cm    
  2. 36 m    
  3. 42 mm    
  4. 36 mm    

The correct answer is: 36 mm

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