A

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Q. A hollow iron pipe is 21 cm long and its external diameter is 8 cm. If the thickness of the pipe is 1 cm and iron weights 8 g/cm^3, then the weight of the pipe is:

  • (A) 3.6 kg
  • (B) 3.696 kg
  • (C) 36 kg
  • (D) 36.9 kg
  • Correct Answer - Option(B)
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  • Filed under category Math
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