kak tolong bantu jawab plisss!

1. Luas selimut tabung
= 2πr x t
= 2 . 22/7 . 3,5 . 8
= 44/7 . 28
= 176

2. Luas selimut tabung r=d/2=6/2=3
= 2πr x t
= 2 . 3,14 . 3 . 10
= 18,84 . 10
= 188,4