Answer
The answer is below.
Work Step by Step
We first solve for the combined efficiencies of the engines:
$= 1-\frac{T_c}{T_h}=1-\frac{313K}{1723K}=.82$
We now find the efficiencies of the independent engines:
$e_{gas}=1-\frac{773K}{1723K}=.55$
$e_{steam}=1-\frac{313K}{773K}=.6$
