Penjelasan dengan langkah-langkah:
p : l = 7 : 4
keliling = 66 cm
k = 2 (p + l)
66 = 2 (7x + 4x)
66 = 22x
x = 3
Panjang = 7(3) = 21 cm
Lebar = 4(3) = 12 cm
Luas persegi panjang
L = p . l
L = 21 cm . 12 cm
L = 252 cm^2
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Penjelasan dengan langkah-langkah:
p : l = 7 : 4
keliling = 66 cm
k = 2 (p + l)
66 = 2 (7x + 4x)
66 = 22x
x = 3
Panjang = 7(3) = 21 cm
Lebar = 4(3) = 12 cm
Luas persegi panjang
L = p . l
L = 21 cm . 12 cm
L = 252 cm^2