Units and Measurements (Quiz)

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Q.1 The internal and external diameters of a hollow cylinder are measured with the help of a vernier callipers. Their values are 4.23 ± 0.01 cm and 3.87 ± 0.01cm, respectively. The thickness of the wall of the cylinder is
  0.36 ± 0.02cm
  0.18 ± 0.02 cm
  0.36 ± 0.01cm
  0.18 ± 0.01 cm