Jawabanmu

2014-02-24T18:54:48+07:00
V= 30*40*50
= 60.000cm^3
=0,06m^3

massa = ρ*V
= 800*0,06
=48kg

g=10m/s^2
F= W=m*g
=48*10
=480N

tekanan terbesar, jadi luasnya harus yang terkecil
A terkecil = 30*40
=1200cm^2
=0,12m^2
P=F/A
=480/0,12
= 4000Pa

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