tolong dijawab no 36 ya makasii

diket :
r = 15 cm
tinggi kerucut = 20 cm
ditanya : V = ?
Jawab :
Vbangun = V kerucut + V 1/2 bola
V = 1/3 × LA × tinggi + 1/2 × 4/3 × π×r×r×r
V = 1/3 × π×r×r × t + 1/2 × 4/3 × π×r×r×r
V = 1/3 × 3,14 × 15 ×15 × 20 + 1/2 × 4/3 × 3,14 × 15 × 15 × 15
V = 3,14 × 75 × 20+ 2× 3,14 × 1125
V = 4710 + 7065
V = 11.775

Jawabannya A