$\"\"$

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Observe the figure :

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The $\"\"$ -axis is plaed along the $\"\"$ foot length.

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The $\"\"$ -axis is placed along the $\"\"$ foot length.

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The general form of ellipse equation is $\"\"$ where $\"\"$ .

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Here $\"\"$ and $\"\"$ .

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$\"\"$ and $\"\"$ .

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Substitute $\"\"$ and $\"\"$ in $\"\"$ .

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$\"\"$

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Find the width $\"\"$ feet from vertex.

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The distance from vertex to center is $\"\"$ .

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The distance of $\"\"$ feet from vertex is $\"\"$ .

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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The value of $\"\"$ is $\"\"$ .

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The width $\"\"$ feet from vertex is $\"\"$ .

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$\"\"$

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The width $\"\"$ feet from vertex is $\"\"$ .