Jawabanmu

2014-08-28T17:23:55+07:00
A = 20 + 31 = 51
b = 3/10 + 3/4 = 6/20 + 15/20 = 21/ 20 = 1 1/20
a + b = 51 + 1 1/20 = 52 1/20 kg
9 4 9
2014-08-28T17:30:46+07:00