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K = 2(p+l)
64/2 = 32
panjang = 9/16 x 32 = 18 cm
lebar = 7/16 x 32 = 14 cm
Luas = 18 cm x 14 cm = 252 cm²
2(p+l) = 64
2p+2l= 64
p+l = 32
18+14=32
p =18
l=14
l= p x l
L= 18 x 14 = 252