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K = 94 m
pnjang = 7 + l
maka :
K = 2 x (p+l)
94 = 2 x (7 + l + l)
94 = 2 x (7+2l)
94 = 14 + 4l
4l = 94-14
l = 80/4
l = 20 cm
jadi lebar = 20 cm
panjang = 7 + 20 = 27 cm
Luas = p x l
= 27 x 20
= 540 cm²
semoga membantu
maaf jika salah