2024 BTYSS P1 Q21

2024 BTYSS P1 Q21

Secondary 4
4 marks

The following diagram shows a solid toy with a hemispherical top of diameter \(8\text{ cm}\) and a inverted conical bottom of vertical height \(5\text{ cm}\).

  1. Find the slant height of the cone.[1]
  2. Find the total surface area of the toy.[3]

Solution:

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Answer:(a) \(6.40\text{ cm}\) (b) \(181\text{ cm}^2\)

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