Question

Keliling persegi panjang 36 cm, jika panjangnya sama dengan dua kali lebarnya, maka luas persegi panjang adalah........

Answer 1

Diket:
K = 36 cm
p = 2l
l = l

Dit:
L =....?

Jwb :
K = 2 (p+l)
36 = 2( 2l + l)
36 = 4l + 2l
36 = 6l
l = 36/6
l = 6

p = 2l
= 2x6
=12

L= pxl
= 12 x 6
= 72

Answer 2

Kell = 2p + 2l
36 = 2(2l) + 2l
36 = 4l + 2l
36 = 6l
l = 6 cm
maka, p= 12

Luas = p×l = 12×6= 72 cm^2