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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 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.