ECZ 2020 · O-Level Paper 2 · Question 6 — Mensuration

The figure is a frustum of a cone. The base radius and top radius are 10 cm and 5 cm respectively, while the height is 12 cm. (Take pi as 3.142.)

(a) The figure is a frustum of a cone with base radius 10 cm, top radius 5 cm and height 12 cm. (Take pi as 3.142.) Calculate its volume.[6]

Verified working — step 1

Volume of a frustum = (13) pi h (R² + Rr + r²)

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Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.

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