Question

P & l persegi panjang berbanding 5:3 jika k bangun tersebut 96 cm maka luas bangun tersebut=...

Answer 1

Klilig = 2 (p +l )
96    = 2 ( 5a + 3a)
96    = 2 ( 8a)
96    = 16a
96/16 = a
   6  = a
panjang = 5 x 6 = 30 cm
lebar = 3 x 6 = 18

luas = p x l
       = 30 x 18
       = 540 cm²

Answer 2

Keliling = 2p + 2l
96 = 2 x 5a + 2 x 3a
96 = 10a+6a
96 = 16a
a = 96/16 = 6
panjang = 5 x 6 = 30 cm
lebar = 3 x 6 = 18 cm
luas = p x l = 30 x 18 = 540 cm²