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JEE Main 2022 (Online) 24th June Evening Shift

MCQ+4 / -12022
একটি কার্ন ইঞ্জিন \({727^ \circ }C\) তাপমাত্রার উৎস থেকে 5000 kcal তাপ আহরণ করে এবং এটি \({127^ \circ }C\) তাপমাত্রার গ্রাহককে দেয়। ইঞ্জিন কতৃক কৃতকার্য,

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