ka tolong sama caranya ya

tinggi kerucut :
t² = s² - r²
t² = 39² - 15²
t² = 1296
t = √1296
t = 36

V kerucut = ⅓ × L alas × t kerucut
= ⅓ × 3,14 × 15 × 15 × 36
= 8478 cm³

V ½ bola = ½ × 4/3 × Π × r³
= ½ × 4/3 × 3,14 × 15 × 15 × 15
= 7065 cm³

Volume bangun tersebut = V kerucut + V ½ bola = 8478 + 7065 = 15.543 cm³ (a)