In figure shown, E is a heat engine with efficiency of 0.4 and R is a – McqOptions

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1.	In figure shown, E is a heat engine with efficiency of 0.4 and R is a refrigerator. It is given that Q2 + Q4 = 3Q1. The C.O.P. of the refrigerator is
A.	2.5
B.	3.0
C.	4.0
D.	5.0
Answer» E.

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