tolong di jawab ya kakjjjjjj

1. V = π × d² × t
    ⇒ = 22/7 × 28/2 × 28/2 × 20
    ⇒ = 12.320 cm³

2. V = π × d² × t
    ⇒ = 22/7 × 7/2 × 7/2 × 16 
    ⇒ = 616 cm³

3. V = π × d² × t
    ⇒ = 22/7 × 14/2 × 14/2 × 10
    ⇒ = 1.540 cm³

Semoga bermanfaat 
kenapa caraku pakai per 2 karena diameter jadi pakai per 2