Answer:
The width is 10 feet.
Step-by-step explanation:
We know that the area of a rectangle is given by the formula:
Where <em>L</em> is the length and <em>W</em> is the width.
We are given that the length of the rectangle is three times the width. In other words:
The total area is 300 square feet. And we want to determine the width of the rectangle.
So, substitute 300 for <em>A</em> and 3<em>W</em> for <em>L: </em>
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Multiply:
Divide both sides by three:
And take the principal square root of both sides. So:
Thus, the width of the rectangle is 10 feet.