Question

Keliling kebun 390 m. panjang dan lebar berbanding 8:5. berapa luas kebun tersebut?

Answer 1

K = 2(p+l)
390/2 = p+l
p+l = 195 m
p = 8/13 × 195 = 8 × 15 = 120 m
l = 5/13 × 195 = 5 × 15 = 75 m
L = pl
L = 120 × 75
L = 9000 m²

Semoga membantu^^