" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
luas permukaan bola = 4 x π x r x r
= 4 x 22/7 x 10,5 x 10,5
= 1386 cm²
L bola = 4 π r²
= 4 × 22/7 × 21/2 × 21/2 cm²
= 1386 cm²