Answer:
The perimeter of the scale floor is 34 inches.
Step-by-step explanation:
To solve, we can set up fractions:
[tex]\frac{21}{7}=\frac{30}{x}[/tex]
Cross multiply and you get:
21x = 210
Divide each side by 21:
x = 10
Since you are trying to find the perimeter of the floor, you can use this equation:
2w + 2l = p
Substitute to solve:
2 ( width = 10 )
2 ( length = 7 )
2 ( 7 ) + 2 ( 10 ) = p
14 + 20 = p
34 = p
