The reading of spring balance when a block is suspended from it in air, is $60\,N$. This reading is changed to $40\, N$ when the block is immersed in water. The specific density of the block is
Medium
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${W_{app}} = {W_{actual}}\,\left( {1 - \frac{{{\rho _L}}}{{{\rho _s}}}} \right)$
$\Rightarrow 40=60\left(1-\frac{1}{\rho_{\mathrm{s}}}\right)$
$\Rightarrow \rho_{s}=3$
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