$\because T=18 s$
So distance travelled in $36 \mathrm{sec}=8 \mathrm{A}$
$=8 \times 3=24 \mathrm{cm}$


$2\,\frac{{{d^2}x}}{{d{t^2}}} + 32x = 0$
where $x$ is the displacement from the mean position of rest. The period of its oscillation (in seconds) is
