Explanation: \(\text{Hints: } T = \frac{hrpg}{2} \\ \text{Solve: আমরা জানি, } T = \frac{hrpg}{2} \\ \implies h = \frac{2T}{rpg} = \frac{2 \times 7.2 \times 10^{-2}}{0.11 \times 10^{-3} \times 10^3 \times 9.8} \\ \therefore h = 0.1336 \\ \text{Ans. (D)}\)