yang bisa tolong donk ,, pakai cara ya mksh ^^

Bab Bangun Ruang Sisi Lengkung

Cari dulu tinggi kerucut
t^2 = s^2 - r^2
t^2 = 39^2 - 15^2
t^2 = 1.521 - 225
t = √1.296
t = 36 cm

Volume bangun
= 1/2 × 4/3 × π × r^3 + 1/3 × π × r^2 × t
= (r^2 × π)/3 × (2r + t)
= (15^2 × π)/3 × (2 × 15 + 36)
= (225 × π)/3 × (30 + 36)
= 75 × π × 66
= 15.543 cm^3