Homework Answers
Th = 5.7*10^8 K
TL = 817+273 = 1090 K
engine efficiency is given by
n = 1 - TL / Th
n = 1 - 1090 / (5.7*10^8)
n = 0.9999981
or
n = 99.9981 %
============
do comment in case any doubt, will reply for sure.. Goodluck
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