Answer: 10.78 litres
\(r_1=14,\ r_2=7,\ h=30\) cm. Volume of frustum \(=\tfrac13\pi h(r_1^2+r_2^2+r_1r_2)\)
\[=\tfrac13\times\tfrac{22}{7}\times30\times(196+49+98)\]
\[=\tfrac{220}{7}\times343=10780\ \text{cm}^3\]
\(10780\div1000=10.78\) litres.
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Doubtly AI
· 24 Oct 2026
AI-verified · Oct 2026
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