2025 YCKSS PRELIMS P1 Q26

2025 YCKSS PRELIMS P1 Q26

Secondary 4
5 marks

An inverted cone has base radius 6 cm and height 14 cm. It contains water to a depth of 7 cm. The cone is then turned upright and the empty conical height is h cm.

  1. Find, in terms of π, the capacity of the cone.[1]
  2. Find, in terms of π, the volume of water.[2]
  3. Find \(h\).[2]

Solution:

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Answer:(i) \(168\pi\text{ cm}^3\) (ii) \(21\pi\text{ cm}^3\) (iii) \(13.4\text{ cm}\)

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