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Vt = π × r × r × t
Vt = π × 3 × 3 × 4
Vt = 36π
Hitung volume kerucut
Vk = 1/3 × π × r × r × t
Vk = 1/3 × π × 3 × 3 × 2
Vk = 6π
Mencari tinggi pasir setelah wadah dibalik
Volume setelah dibalik = volume awal
volume kerucut + volume sebagian tabung = volume seluruh tabung
6π + π × r × r × t₂ = 36π
6π + π × 3 × 3 × t₂ = 36π
6π + 9π × t₂ = 36π
9π × t₂ = 36π - 6π
9π × t₂ = 30π
t₂ = 30π/9π
t₂ = 10/3
t₂ = 3,3333 cm