Jawabanmu

2014-05-08T20:18:39+07:00
Q1 = Q2 m.c.delta t = m.c.delta t 1 (90 - t) = 2 (t-60) 90 - t = 2t - 120 210 = 3t 70 = t
thanks ya,,..moga jawabanmu membantuku.