The volume of a metallic cylindrical pipe is 7480 cm3. If its length is 1.4 m and its external radius is 9 cm, then its thickness (given π = 22/7) is:

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SSC CGL Previous Paper 46 (Held On: 6 June 2019 Shift 1)
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  1. 1.2 cm
  2. 0.9 cm
  3. 0.8 cm
  4. 1 cm

Answer (Detailed Solution Below)

Option 4 : 1 cm
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Detailed Solution

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GIven:

Length of the cylinder (h) = 1.4 m = 140 cm, External radius of cylinder, R = 9 cm and internal radius of cylinder = r cm

 

Concept:

Volume of solid cylinder, 

Volume of hollow cylinder, 

Calculation:

Volume of hollow cylinder = 

⇒ r = 8 cm

∴ Thickness of the cylindrical pipe = R – r = 9 – 8 = 1 cm

 

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