2026 CSS P1 Q20

2026 CSS P1 Q20

Secondary 4
3 marks

A solid is made up of a hemisphere, a cylinder and a cone, each having the same radius.

The height of the hemisphere, cylinder and cone is \(3r\), \(5r\) and \(4r\) respectively.

Find, in terms of \(\pi\) and \(r\), the total surface area of the solid.[3]

Solution:

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Answer:\(63\pi r^2\)

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