Physical Quantities and Measurement — Question 8

Mass of solid = 72 g

Volume of solid = Final volume of water - Initial volume of water

Volume of solid = 42 - 24 = 18 mL

$\text{Density of Solid}= \dfrac{\text{Mass of Solid}}{\text{Volume of Solid}} \\[1em] = \dfrac{\text{72}}{\text{18}} = 4$

So, Density of solid = 4.0 g cm^-3.