Answer: [tex]2\frac{1}{2}[/tex] cup of the floor  is required.
Step-by-step explanation:
For 12 muffins  it requires = 1 cup of floor
for 1 muffin  it will require = [tex]\frac{1}{12}[/tex] of the floor
for 30 muffins we require = [tex]\frac{1X 30}{12}[/tex] of the floor
                      [tex]\frac{30}{12}[/tex]  of the floor
                      [tex]\frac{5}{2}[/tex] of the floor
                       [tex]2\frac{1}{2}[/tex] cup of the floor