Jawabanmu

2014-03-03T17:00:18+07:00
M=masa jenis.volume balok
   =700.600
   =420000kg
2014-03-03T17:37:54+07:00
Volume p.l.t : 3.20.10
= 600 m3
massa jenis = massa/vol
700 = massa/600
massa = 700.600
massa = 420.000 kg