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25x18xT=3600
T = 3600 / (25x18)
T=3.600/450
T= 8
LP=2(PL+PT+LT)
= 2(25*18+25x8+15x*)
= 2(450+200+144)
=2(794)
= 1.588
-Volume=3600
panjan=25
lebar =18
jawab:Vbalok=p x l x t
3600=25x18xt
3600=450t
t=3600 : 450
=8
luas permukaan
a.2xpxl
=2x25x18
=900
b.2xpxt
2x25x8
=400
c.2xlxt
2x18x8
=288
luas permukaanya=900+400+288= 1588