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K = 64
P = 3x
l = x
maka :
K = 2 x (p+l)
64 = 2 x (3x + x)
64 = 2 x (4x)
64 = 8x
x = 64 / 8 = 8
maka :
panjang = 3x = 3 x 8 = 24
lebar = x = 8
Luas = p x l
= 24 x 8
= 192 m²
64 = 2(3l+l)
64 = 2(4l)
64 = 8l
8m= l
P = 3l = 3x8 = 24m
L = pxl = 24x8 = 192 m^
*^ = kuadrat