" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
=
= 20
r = √20 cm = 4,47 cm
K = 2πr
= 2× 3,14 × 4,47 cm
= 28,07 cm
=3,14.20cm2 =62,8 cm2
L=pi.r2
62.8cm2 =3,14.r2
62.8cm2/ 3.14 =r2
20cm =r2
sqrt20cm =r
4,47 =r