tolong caranya ya teman-teman terimakasih :)

Volume kerucut + volume belahan bola
= 1/3πr²t + 1/2.4/3πr³
= 1/3πr²t + 2/3πr³
= 1/3πr²(t + 2r)
= 1/3(3, 14)(12)²(16 + 2.12)
= (1/3)(3, 14)(144)(16 + 24)
= 150,72(40)
= 6.028,8 cm³

Berat bandul
= 6.028,8 cm³ x 10 g/cm³
= 60.288 gram = 60, 288 kg (c)