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Verified answer
3,14×10×10= 314cm2maaf kalo salah
kalo nyari luas bola tinggal di kali 4
d = 20 cm => r = 10 cm
Luas = 4πr^2
= 4 . 3,14 . 10 . 10
= 4 . 314
= 1.256 cm^2