Jawabanmu

2014-06-01T16:10:51+07:00
Lpersegipanjang = p*l 121.500 = 5x*3x 121.500 = 15x 121.500 / 15 = x 8.100 = x kalo udah ketemu "x" nya,tinggal dikalikan. Panjang = 5x = 5*8.100 = 40.500m Lebar = 3x = 3*8.100 = 24.300m