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A solid lead sphere of radius 6 cm is melted and recast into small solid cylinders, each of radius 2 cm and height 3 cm. How many cylinders are made?

Competition practiceMensuration
  • A12
  • B24
  • C48
  • D18

Step-by-Step Solution

Sphere = 4/3 × π × π ; one cylinder = π × π . Number = 288π ÷ 12π = 24.
Answer: B) 24

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