Jawabanmu

2014-04-30T10:58:11+07:00
Qlepas=Qterima m1x(T1-T)=m2x(T-T2) 0,5x(60-T)=0,25(T-20) 30-0,5T=0,25T-5 30+5=0,25T+0,5T 35=0,75T 47°C=T