Tolong yg nmor 9 dong Pleasee Volume kerucut pda gambar di samping adalah.......cm3

Diketahui =
• tinggi (t) kerucut = 40 cm
• diameter ½ bola dan alas kerucut = 40 cm

Ditanya = volume bangun ?

Jawab =
• Rumus volume (V) kerucut = ⅓πr²t
• Rumus volume (V) ½ bola = 2/3πr³

• r = ½ d
= ½ × 40
= 20 cm

• V kerucut = ⅓πr²t
= ⅓ × 3,14 × 20 × 20 × 40
= 50240/3
= 16746,67 cm³

• V ½ bola = 2/3πr³
= 2/3 × 3,14 × 20 × 20 × 20
= 25120/3
= 8373,33 cm³

• V bangun = V kerucut + V ½ bola
= 16746,67 + 8373,33
= 25120 cm³