Keliling sebidang kebun 280 meter. Jika panjang kebun = 1'1/3 × lebarnya, berapa cm2 luas kebun tersebut? tolong di jawab yah ☺

Panjang = 4a
Lebar = 3a

Keliling = 2p + 2l
280 m = (2*4a) + (2*3a)
280 m = 14a
280 m : 14 = a
20 m = a

Panjang
= 4a
= 4(20 m)
= 80 m

Lebar
= 3a
= 3(20 m)
= 60 m

Luas = pl = 80 m (60 m) = 4800 m^2