Tolong please, cepat skrg jg cuma no 1

Luas Permukaan = 2 π r ( r + t )
= 2 x 3,14 x 10 ( 10 + 12 )
=62,8 x 22 =1381,6 cm²

Volume = π r² t = 3,14 x 10 x 10 x 12
= 3768 cm³