luas lingkaranyang keliling nya 440 cm adalah?

k = 2πr
440 = 2.22/7.r
r = 7/44 . 440
r = 70 cm

L = πr²
22/7 . 70.70
L =15.400 cm²

440:3,14=140
d=140= r=70
L=22x70x70:10= 15400