Jawabanmu

2016-01-03T18:10:16+07:00
volume = phi x r² x t
924 = 22/7 x r² x 6
r² = 924 : 22/7 : 6
r² = 49
r = 7 cm

luas permukaan tanpa tutup = phi x r (r+2t)
= 22/7 x 7 x (7+2x6) = 418 cm²