Jawabanmu

2014-04-15T18:56:53+07:00
M = Q:(cxdeltaT)=42000:(350x20)=42000:7000= 6
jadi, massa nya 6 kg
maaf kalo salah

2014-04-15T19:01:36+07:00
M=Q/cxdelta T =42.000/350x20 =42.000/7.000 =6 kg.