Explanation: \(\text{Hints: } \frac{v_2}{v_1} = \sqrt{\frac{T_2}{T_1}}\) \(\text{Solve: } \frac{v_2}{v_1} = \sqrt{\frac{T_2}{T_1}} \implies v_2 = \sqrt{\frac{303}{273}} \cdot v_1 \implies v_2 = 1.045 \cdot v_1\) \(\implies v_2 = v_1 + 0.045v_1 = v_1 + 4.5\%v_1\) \(\text{Ans. (C) [প্রায় কাছাকাছি]}\) \(\text{ব্যাখ্যা: } v \propto \sqrt{T}, \, \text{অতএব } v_1 = k\sqrt{T_1} \, \text{এবং } v_2 = k\sqrt{T_2} \implies \frac{v_2}{v_1} = \sqrt{\frac{T_2}{T_1}}\)