Q 30. An irreversible heat engine extracts heat from a high temperature source at a rate of 100kW and rejects heat to a sink at a rate of 50kW. The entire work output of the heat engine is used to drive
a reversible heat pump operating between a set of independent isothermal heat reservoirs at 
at which the heat pump delivers heat to its high temperature sink is
(A) 50
(B) 250
(C) 300
(D) 360
Answer: (C)
Explanation:
