GATE XE 2017 XE-E Q91: Second Law of Thermodynamics

A heat engine receives

kJ of heat from a hot reservoir and rejects

kJ of heat to a cold reservoir. The work delivered by the heat engine is entirely supplied to a heat pump, which receives

kJ of heat from another reservoir and rejects

kJ of heat to the same cold reservoir. If the efficiency of the heat engine is 0.4 and COP of the heat pump is 4.0, the value of

(up to 1 decimal place) is _________.

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