\( \frac{V}{4 \ell_2}=110 \Rightarrow \ell_2=\frac{3}{4} \mathrm{~m} \)
\( \Delta \ell=2 \mathrm{~m},\)
Change in volume \(=A \Delta \ell=400 \mathrm{~cm}^3\)
\(M={4 0 0} \mathrm{g} ;\left(\because \rho=1 \mathrm{~g} / \mathrm{cm}^3\right)\)
$[\,dB$ માં લબ્ધિ $\left.=10 \log _{10}\left(\frac{ P _{ o }}{ P _{i}}\right)\right]$