Larry leaves home at 9: 05 and runs at a constant speed to the lamppost. he reaches the lamppost at 9: 07, immediately turns, and runs to the tree. larry arrived at the tree at 9: 12.

Answer choices? if there is any

If the heat engine is a perfect carnot cycle engine, thenefficiency = (t2-t1)/t2   where t1=temperature of cold reservoir ( ° k) = 135            t2=temperature of hot reservoir ( ° k)   = 325thereforeefficiency = (t2-t1)/t2 = (325-135)/325 = 0.5846 = 58%  note: this is the theoretical maximum efficiency of a perfect heat engine.   real-life engines do not achieve this value.