Jawabanmu

2016-07-29T12:09:10+07:00
luas permukaan tabung tanpa tutup
= phi x r x (r+2t)
= 3,14 x 6,5 x (6,5 + 18)
= 20,41 x 24,5
= 500,045 cm^2

volume = phi x r^2 x t
             = 3,14 x 6,5^2 x 18
             = 2387,97 cm^3
5 4 5