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A solid metallic sphere of radius 3 cm is melted and recast into small spheres each of radius 1 cm. The number of small spheres formed is:

Competition practiceAreas & Volumes
  • A30
  • B24
  • C27
  • D54

Step-by-Step Solution

Number = volume of big sphere ÷ volume of small sphere = (4/3 π ) ÷ (4/3 π ) = 27 ÷ 1 = 27.
Answer: C) 27

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