η=1-T2T1⇒50100=1-T2T1⇒T2T1=12
⇒T1=2T2=2×300=600K
η=1-T2T1⇒60100=1-T2T1⇒T2T1=25
∴T1=5T12=5×3002=750 K
∴ তাপমাত্রা বাড়াতে হবে=750-600=150∘C Ans.
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