Explanation:
a).
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
So we have
[tex]density = \frac{5}{15} = \frac{1}{3} \\ = 0.33333...[/tex]
We have the answer as
0.33 g/cm³
b).
The block will float on water since it's density is less than that of water which is
1 g/cm³
Hope this helps you
