<p>A stone tied to&nbsp; 180cm long string at its end is making 28 revolutions in&nbsp;horizontal circle in every minute. The magnitude of acceleration of stone is&nbsp;<span class="equation">\(\frac{1936}{x} ms^{-2}\)</span>&nbsp;. The value of x _________.<span class="equation">\(\begin{pmatrix}
\pi = \frac{22}{7}
\end{pmatrix}\)</span>​​​​​​​</p>