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939

Q:

The length of a hollow thick cylindrical metallic pipe is 6 cm and its total surface area including the surface at the ends is 98π sq. cm. If the outer diameter is 8 cm, then the inner diameter in cm is 

  • 1
    6.5
  • 2
    7
  • 3
    5
  • 4
    6
  • Show Answer
  • Workspace

Answer : 4. "6"

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