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Question

লোহার ইয়াংয়ের গুণাংক

20 \times 10^{10} N m^{- 2}

এবং ঘনত্ব p = 7800 kg

m^{- 3}

। লোহার মধ্যদিয়ে শব্দের বেগ-

5063.7 m s^{- 1}

6300 m s^{- 1}

7200 m s^{- 1}

5500 m s^{- 1}

ANS : 1

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