Luas 243 , panjang dan lebar ,? Jika panjang 3x lebar

[tex]p = 3l[/tex]
[tex]luas = p \times l \\ 243 = 3l \times l \\ 243 = {3l}^{2} \\ \frac{243}{3} = {l}^{2} \\ {l}^{2} = 81 \\ l = 9[/tex]
p= 3l
p = 3(9)
p = 27

L = p x l
243 = 3x . x
243 = 3(9) x (9)

Jadi, panjagnya = 3(9) = 27 cm dan lebarnya = 9 cm