A semicircle folded into a cone

A semicircle folded into a cone

Secondary 2
4 marks
TGM Original Questions

Core stretch

A semicircle of diameter 14 cm is folded so that its curved arc becomes the circumference of a cone base. Find

  1. the cone base radius,[2]
  2. its curved surface area in terms of \(\pi\).[2]

Solution:

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Answer:(a) \(3.5\) cm (b) \(24.5\pi\text{ cm}^2\).

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