Answer:
The length of Louise’s basement is 90 feet.
Step-by-step explanation:
Given:
Louis wants to carpet the rectangular floor of his basement.
The basement has an area of 4860 square feet.
The width of the basement is 3/5 it’s length.
Now, to find the length of Louise’s basement.
Let the length of basement be [tex]x.[/tex]
So, the width is:
[tex]\frac{3}{5}\ of\ x\\=\frac{3}{5}\times x\\=\frac{3x}{5}[/tex]
Area of the basement = 4860 square feet.
Now, to get the width of basement we put formula:
[tex]Area=length\times width[/tex]
[tex]4860=x\times \frac{3x}{5}[/tex]
[tex]4860=\frac{3x^2}{5}[/tex]
Multiplying both sides by 5 we get:
[tex]24300=3x^2[/tex]
Dividing both sides by 3 we get:
[tex]8100=x^2[/tex]
Using square root on both sides we get:
[tex]90=x[/tex]
[tex]x=90\ feet.[/tex]
Therefore, the length of Louise’s basement is 90 feet.