Panjang dan lebar persegi panjang berbanding 5:3. jika kelilingnya 96cm , maka luas persegi panjang adalah
betiga
P:l = 5:3 ⇔p = (5/3)l K = 2(p+l) 96 = 2* ((5/3)l+l) 48=(8/3)l l = 48*(3/8) =18 cm p= (5/3)l=(5/3)18=30 cm maka luas persegi panjang = L = p*l =30*18 =540 cm persegi
arifahluwung
Rumus keliling persegi panjang = 2 ( P + L ) P/L = 5/3 --> P = 5/3 L 5/3 L + L = 96 --> 8/3 L = 96 --> L = 36 2 ( P + L ) = 96 --> 2 ( P + 36 ) = 96 --> 2P+72 = 96 --> 2P = 24 --> P = 12 JADI LUASNYA = 12 X 36 = 432.
K = 2(p+l)
96 = 2* ((5/3)l+l)
48=(8/3)l
l = 48*(3/8) =18 cm
p= (5/3)l=(5/3)18=30 cm
maka luas persegi panjang = L = p*l =30*18 =540 cm persegi
P/L = 5/3 --> P = 5/3 L
5/3 L + L = 96 --> 8/3 L = 96 --> L = 36
2 ( P + L ) = 96 --> 2 ( P + 36 ) = 96 --> 2P+72 = 96 --> 2P = 24 --> P = 12
JADI LUASNYA = 12 X 36 = 432.