Jawabanmu

2014-04-15T21:57:47+07:00
5x3x2=810 => 30X=810 => X=^3√27 => 3 ==> p=15……l=9……t=6……==>……LP=2(15x9 + 15x6 + 9x6) => 2(279)=558cm^2
2014-04-15T23:07:40+07:00
V=plt....... 810=5a*3a*2a...... 810=30a^3...... a^3=810:30…… a^3=27..... a=3....... p=5*3=15...... l=3*3=9....... t=2*3=6....... Lpmkn=2pl+2pt+2lt=2*15*9+2*15*6+2*9*6=270+180+108=458