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Mapel : Matematika
Bab : Bangun Ruang Sisi Lengkung

Diketahui :
- V₁ = 30 dm³
- r₁ = r
- t₁ = t
- r₂ = 2r
- t₂ = 3t

Ditanya :
- V₂ = .....?

Penyelesaian :
- V₂ :

[tex] \frac{v1}{v2} \\ = \frac{ \frac{1}{3} \times \pi \times r1 \times r1 \times t1}{ \frac{1}{3} \times \pi \times r2 \times r2 \times t2 } \\ = \frac{r \times r \times t}{2r \times 2r \times 3t} \\ = \frac{r ^{2}t }{12r ^{2}t } \\ = \frac{1}{12} [/tex]

V₂ = 12 × V₁
V₂ = 12 × 30 dm³
V₂ = 360 dm³

Jawaban : C. 360 dm³

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