## Essential University Physics: Volume 1 (3rd Edition)

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: $e_{gas}=1-\frac{773K}{1723K}=.55$ $e_{steam}=1-\frac{313K}{773K}=.6$