An engine operates between temperatures of 577 K and 377 K a

An engine operates between temperatures of 577 K and 377 K at 76.0% of its maximum possible efficiency. (a) What is the efficiency of this engine?

max efficiency = 1- Tcold/Thot = 1- 377/577 = 0.346

efficiency of this engine = 76 % of 0.346 = 0.76*0.346 = 0.262 OR 26.2 %