Question

The area of certain circular disc is 616 cm square find its radius

Answer 1

ANSWER:-

Given:

The area of certain circular disc is 616cm².

To find:

Find its radius.

Solution:

We know that area of circle is πr².

Therefore,

Circular disc = 616cm²

=) πr² = 616

$= > \frac{22}{7} \times {r}^{2} = 616 \\ \\ = > {r}^{2} = \frac{616 \times 7}{22} \\ \\ = > {r}^{2} = 28 \times 7 \\ \\ = > {r}^{2} = 196 \\ \\ = > r = \sqrt{196} \\ \\ = > r = 14cm$

Hence,

The radius required is 14cm.

Additional Information:

• Perimeter of circle= 2πr
• Area of circle= πr²
• Radius of circle= d/2
• Diameter of circle= 2r.

Hope it helps ☺️

Answer 2

Answer:

16cm is the radius of the circle