Jawabanmu

2014-06-11T15:14:52+07:00
Efisiensi = 1-Tr/Tt . 100% 40% = 1- Tr/500 . 100% 4/10 = 1-Tr/500 Tr/500 = 1-4/10 Tr/500 = 6/10 Tr = 300 K