" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
vol = π. r² . t
20790=22/7. r² . 15
r² = 20790 : (22/7 x 15)
r² = 441
r =√441
r = 21
luas permukaan
= πr² + 2πrt
= π.r.(r + 2t)
= 22/7 . 21 . ( 21 + 2.15)
= 3366 cm³