" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
90cm2= 4. 3.14. r2
r2= 90cm2 : 12,56 = 7
r = akar 7 = 2,6cm
Lp. 2vr( r+t)
= 2. 3,14. 2,6cm ( 2,6+ 2,6)
= 6,28 . 2,6 ( 5,2)
= 16,328 . 5,2
= 84,9
= 135cm²
semoga membantu