Answer:
The value is [tex]\eta = 63\%[/tex]
Explanation:
Generally the thermal efficiency is mathematically represented as
[tex]\eta = 1 - \frac{T_L}{T_H} * 100[/tex]
substituting [ 627°C + 273 = 900K ] for [tex] T_H[/tex] and [ 90°C + 273 = 333K ] for [tex] T_L[/tex]
So
[tex]\eta = 1 - \frac{333}{900} *100[/tex]
=> [tex]\eta = 63\%[/tex]
