Volume bangunan tersebut adalah

MAPEL = MATEMATIKA
KELAS = 9
BAB = BRSL

diketahui =
diamater = 30cm, maka r = 15cm
garis pelukis (s) = 39cm

ditanya = V.bangun??

V. belahan bola = 2/3πr³
= 2/3 × 3,14 × 15 × 15 × 15
= 2 × 3,14 × 5 × 15 × 15
= 6,28 × 1125
= 7065cm³

t = √s² - r²
t = √39² - 15²
t = √1521 - 225
t = √1296
t = 36cm

V. kerucut = ⅓πr²t
= ⅓ × 3,14 × 15 × 15 × 36
= 3,14 × 5 × 15 × 36
= 3,14 × 2700
= 8478cm³

V. bangun = V. belahan bola + V. kerucut
= 7065cm³ + 8478cm³
= 15543cm³

semoga membantu