Jawabanmu

2014-04-16T16:55:51+07:00
K=2(4+3)=14 cm
L sebenarnya= 4(3000)x3(3000)=12000x9000=108.000.000 cm2= 1.080 km2
2014-04-16T17:19:13+07:00
K= 2 X (4 + 3)= 14 cm 

PANJANG= 4 X 3000 =12.000

LEBAR = 3 X 3000 = 9000

L = P X L = 12.000 X 9000 =108.000.000