" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
π = 22/7
Dit : d ... ?
Jwb :
L = 4 π r²
78 4/7 = 4 . 22/7 . r²
550/7 = 88/7 . r²
r² = 550/7 : 88/7
r² = 550/7 . 7/88
r² = 550/88
r² = 6,25
r = √6,25
r = 2,5 cm
Maka, d = 2 . r
= 2 . 2,5
= 5 cm
panjang diameter = 10