Question

A block of wood of mass $24kg$ floats in water. The volume of wood is $0.032m^3$ (Density of water $=1000kg{m}^{-3}$). The density of wood is $X\times {10}^{2}kg{m}^{-3}$. Find X.

• A. $7.5$
• B. $2$
• C. $2.5$
• D. $7$

Answer 1

The correct option is A $7.5$

We know that, $Density=\frac{mass}{volume}$

So, $d=\frac{24}{0.032}=750kg{m}^{-3}=7.5\times {10}^{2}kg{m}^{-3}$

Therefore, $X=7.5$