Jawabanmu

2014-02-24T19:34:23+07:00
A) P=F/A
1200=600/A
A=600/1200
A=1/2=0,5m^2

b) 0,5=
0,5=phi*r^2
0,5=22/2*r^2
r^2=1/22
r=1/akar22
terimakasih :)