Question

Area of a circle is 616 CM square find the diameter of a circle

Answer 1

• Answer:

write answer πr2=616 find r and double it

Answer 2

In the above question, it is given that,

The area of a circle is $616cm^{2}$

Here we have to find the diameter of the circle,

Thus, the area of the circle is as follow,

$\begin{array}{l}a=\pi \times r^{2} \\r^{2}=\frac{a}{\pi} \\r=\sqrt{\frac{a}{\pi}} \\r=\sqrt{\frac{616}{7}} \\r=14.0028=14 \mathrm{~cm}\end{array}$

The diameter is as below,

$\begin{array}{l}d=2 r \\=2 \times 14 \\=28 \mathrm{~cm}\end{array}$

Therefore the diameter of the circle is 28cm.