A carnot engine whose sink is at 300 K has an efficiency of 50. by how much should the temperature of source be increased so as the efficiency becomes 70% ?

A Carnot engine whose sink is at 300k has an efficiency of 50%. By how much should the temperature source be increased so as the efficiency becomes 70%?

A carnot.engine whose sink is at 300 K has an efficiency of 40 %. By how much should the temperature of source be increased so as to increase its efficiency by 50% of original efficiency ?

A Carnot engine whose sink is at 300K has an efficiency of 40% . By how much should the temperature of source be increased so as to increase its efficiency by 50% of original efficiency.

A Carnot engine whose sinl is at 300K has an efficiency of 40% . By how much should the temperature of source be increased so as to increase its efficiency by 50% of original efficiency.