1 Answer

Mujeeb · Answer 1 · 2020-10-30T16:53:14+0000

Answer:

$\large\boxed{C=22\pi y\ ft}$

Explanation:

The formula of an area of a circle:

$A=\pi r^2$

r - radius

The formula of a circumference of a circle:

$C=2\pi r$

We have the area of a circle

$A=121y^2\pi ft^2$

Substitute to the formula and solve for r:

$\pi r^2=121y^2\pi$ divide both sides by π

$r^2=121y^2\to r=√(121y^2)\\\\r=11y\ ft$

Put the value of r to the formula of a circumference:

$C=2\pi(11y)=22y\pi ft$

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