# Q. 21.     The volume of $50\; g$ of a substance is $20\; cm^{3}.$ If the density of water is $1\; g\; cm^{-3},$ will the substance float or sink?

Mass of the given amount of substance = 50 g

Volume of the given amount of substance = 20 cm3

Density of the given substance is $\rho$

$\\\rho =\frac{50}{20}\\ \rho =2.5\ cm^{3}$

As the given substance has a higher density than that of water it will be sinking in water.

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