\(\qquad=372\,K\)
\(1-\frac{ T _{ C }}{ T _{ H }}=\frac{1}{3}\)
\(\frac{ T _{ C }}{ T _{ H }}=\frac{2}{3} \quad(1) \Rightarrow T _{ C }=\frac{2}{3} \times 372\)
\(1-\frac{ T _{ C }+ X }{ T _{ H }}=\frac{1}{6}\)
\(\frac{5}{6}=\frac{ T _{ C }+ X }{ T _{ H }}\)
\(\frac{5}{6}=\frac{248+ X }{372}\)
\(248+ X =5 \times 62\)
\(X =310-248=62\,K\)