Explanation:
The density of the material is given by,
Density = [tex]\frac{mass}{Volume}[/tex]
Case 1: Rock
Density = [tex]\frac{mass}{Volume}[/tex]
Density = [tex]\frac{1000}{0.5}[/tex]
Density = 2000 [tex]\frac{g}{L}[/tex]
Case 2: Pillow
Density = [tex]\frac{mass}{Volume}[/tex]
Density = [tex]\frac{200}{10}[/tex]
Density = 20 [tex]\frac{g}{L}[/tex]
Case 3: Bottle of Soda
Density = [tex]\frac{mass}{Volume}[/tex]
Density = [tex]\frac{2000}{2}[/tex]
Density = 1000 [tex]\frac{g}{L}[/tex]
Case 4: Load of bread
Density = [tex]\frac{mass}{Volume}[/tex]
Density = [tex]\frac{100}{1}[/tex]
Density = 100 [tex]\frac{g}{L}[/tex]
Thus, rock and bottle of soda has maximum density.