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p : 5x dan l = 3x
k = 2(p+l)
48 = 2(5x + 3x)
48= 2. 8x
48 = 16x
x= 3 cm
dimasukkan, panjang = 5x= 5.3= 15 cm
lebar = 3x= 3.3= 9 cm
Keliling = 48 cm
panjang : lebar = 5 : 3
Maka,
K = 2(p + l)
48 = 2(p + l)
24 = p + l
p = 5/8 x 24
= 15 cm
l = 3/8 x 24
= 9 cm
Jadi, panjang = 15 cm dan lebar = 9 cm