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A solid metallic cylinder of radius 6 cm and height 15 cm is melted and recast into solid spheres of radius 3 cm. How many spheres are formed?

Competition practiceAreas & Volumes
  • A15
  • B12
  • C20
  • D30

Step-by-Step Solution

Cylinder volume = π × π . Each sphere = (4/3)π × 27 = 36π . Number = 540/36 = 15.
Answer: A) 15

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