Question

Find area of a circle whose diameter is 21 CM

Answer 1

Given,

The diameter of the circle is 21 centimetres.

To find,

The area of the circle.

Solution,

At first,we have calculate the radius of the given circle,by using the following mathematical formula.

Radius = Diameter/2 = 21/2 = 10.5 cm

Now,we have to calculate the area of the circle by using the following mathematical formula,

Area of the circle = π×r² = 22/7 × 10.5 × 10.5 = 346.5 cm²

Hence,the area of the circle is 346.5 cm².

Answer 2

Answer:

Answer is 173.25 cm²

Step-by-step explanation:

hope this answer is correct