Chapter: Mensuration· Mathematics Part 2 (Geometry)
Answer: 16.104 litres
Capacity = volume of frustum \(= \dfrac{1}{3}\pi h (r_1^2 + r_2^2 + r_1 r_2)\), with \(r_1 = 15\), \(r_2 = 12\), h = 28.
\(= \dfrac{1}{3} \times \dfrac{22}{7} \times 28 \times (225 + 144 + 180) = \dfrac{1}{3} \times 88 \times 549 = 88 \times 183 = 16104\) cm\(^3\).
1000 cm\(^3\) = 1 litre, so capacity = 16104 ÷ 1000 = 16.104 litres.