The area of a circle is 9.625 sq cm. Find its diameter.
The area of a circle (A) = 9.625 sq cm.
If the radius of the circle is r cm.
A = pr2.
9.625 = 22/7 * r2
r2 = (9.625 * 7) / 22
r2 = 3.0625
Take square roots on both sides.
r = 1.75
Therefore, the radius of the circle is 1.75 cm.
So, the diameter = 2r = 2 * 1.75 = 3.5 cm.
Directions: Read the above example carefully and answer the following questions. Also write at least 10 examples of your own.