Physics - Wave on String Question with Solution | TestHub

In the figure shown (Fig. 6.103) strings $AB$ and $BC$ have masses $m$ and $2m$ respectively. Both are of the same length $l$. The mass of each string is uniformly distributed on its length. The string is suspended vertically from the ceiling of a room. A small jerk wave pulse is given at the end $C$. It goes up to the upper end $A$ in time $t$. If $m=2$ kg, $l=\frac{9610}{1681}$ m, $g=10$ m/s², $\sqrt{2}=1.4$, $\sqrt{3}=1.7$ then $t$ is equal to: