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A child's top is a cone surmounted on a hemisphere, radius 2.1 cm, total height of the top 5.1 cm. The cone's height = total height - radius. Find the cone's height (cm).

Class 10Surface Area of Combined SolidsMensuration
  • A3
  • B4
  • C6
  • D2

Step-by-Step Solution

Hemisphere contributes its radius (2.1 cm) to the height. Cone height = 5.1 - 2.1 = 3 cm.
Answer: A) 3

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