Question

i have doubt please explain.​

Answer 1

Step-by-step explanation:

Hope you clear about this answer

Answer 2

Ok i'll explain it you. Here, the diameter of an circle is given and you will have to find that circle's area.

Area of the circle = πr² (pi x radius²)

Here only diameter is given. We know that radius is half of that of diameter.

So, if diameter = 21cm, then radius will be 10.5cm.

You can take the value of pi as 3.14.

So, the area = 3.14 x 10.5²

= 3.14 x 100

= 3.14 x 110.25

= 346.5cm²

Hope you understood. Pls mark brainliest