[" A carnot engine whose heat sink is at "27^(@)C" has an efficiency of "40%." By how much degree should the term "],[" of source be changed to increase the efficiency by "10%" of the original."]

A carnot engine whose heat sink is at 27^(@)C has an efficiency of 40% . By how many degrees should the temperature of source be changed to increase the efficiency by 10% of the original efficiency?

A carnot engine whose heat sink is at 27^(@)C has an efficiency of 40% . By how many degrees should the temperature of source be changed to increase the efficiency by 10% of the 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 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 ?