If a carnot engine works as temperature between 300 to 400 K. then find the efficiency of that engine

A heat engine works between temperatures 300K and 600K .The efficiency of the engine can be ?

If the temperature of the source is increased, the efficiency of the carnot engine

The efficiency of carnot engine working between temperatures 200^@ C and 0^@ C is eta_1 . The efficiency of this engine is eta_2 when it work between temperatures 0^@ C and -200^@ C . Then eta_1/eta_2 =_____

A Carnot engine works between 600K and 300K. The efficiency of the engine is

A Carnot engine works between 600K and 300K. The efficiency of the engine is

A carnot engine operates between temperatures T and 400K(Tgt400K) . If efficiency of engine is 25% , the temperature T is :

In a Carnot engine the temperature of source is 1000 K and the efficiency of engine is 70%. What is the temperature of the sink ?