Keliling suatu persegi panjang 60cm. Jika lebarnya kurang 6cm dari panjang nya,maka luas nya adalah?

l = p - 6

K = 2(p + l)
60 = 2(p + p - 6)
2p - 6 = 60/2
2p = 30 + 6
p = 36/2
p = 18 cm

l = p - 6
l = 18 - 6
l = 12 cm

L = p × l
L = 18 × 12
L = 216 cm^2

Diketahui K=60 cm
p= p cm
l = p-6 cm
K = 2( p + l)
60 = 2 ( p + p - 6)
60/2 = 2p - 6
30 = 2p - 6
30 + 6 = 2p
36 = 2p
P = 36/2
P = 18 cm

L = p - 6
L = 18 - 6
L = 12 cm

Luas = p × l
= 18 × 12
= 216 cm^2