" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
L. selimut = 2πrt
616 = 2. 22/7 . 21 . t
t = 616/132
t = 4 , 66 cm
Sekarang cari luas permukaan tabung dengan menggunakan rumus:
L. tabung = 2πr(r + t)
l.tabung = 2.22/7 . 7 . (7 + 4,66)
L.tabung = 2 . 22 . 1 . 11,6
L.tabung = 510,4 cm²