Jawabanmu

2014-01-21T16:23:54+07:00
Jumlah massa A dan B = 2 + 1 = 3
massa A = 2/3 x 60 = 40
massa B = 1/3 x 60 = 20
2014-01-21T16:29:52+07:00
A +  B.....>AB
2  :    1  =  60
40 :  20  = 60
A = 40
B = 20
1 5 1