Luas lingkaran 2464cm2. Brpa kelilingny???? Jwb y pntg bgt nih

Luas Lingkaran = nr^2
Keliling = 2nr
 Luas .....22/7 x r^2 = 2.464
r^2 = 2.646 x 7/22
r^2= 784
r= 28
Keliling= 2 x 22/7 x 28
             =176 cm2

luas = 2464cm²
L= phi r²
2464 = 3,14 x r²
r² = 2464/3,14
r=√784,7 = 28

kelling = 2. 22/7 . 28 = 176 cm