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how do I solve this I know the circumference, area and arc length formulas but I don't understand how to find the diameter of the area is 201.1?

how do I solve this I know the circumference, area and arc length formulas but I don-example-1
User Chong Tang
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1 Answer

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the formula for the area of the circle is


A=\pi r^2

it is given that the area of the circle is 201.1


\begin{gathered} 201.1=(22)/(7)* r^2 \\ r^2=(201.1*7)/(22) \\ \end{gathered}
\begin{gathered} r^2=(1407.7)/(22)=63.98 \\ r=\sqrt[]{63.98}\text{ or }\sqrt[]{64} \\ r=7.98\text{ }\approx8 \end{gathered}

we know that the diameter of the circle is twice of the radius

so, diameter D = 2r = 2 x 8 = 16

so the answer is approx 16

User Ranjith Venkatesh
by
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