Question

please help me....
give step by step explanation buddies please.... ​

Answer 1

Answer:

Given :-

Circumference = 66cm

2πr = 66

r = 66 × 7 /44

r = 21/2

r = 10.5 cm

For area :-

πr²

= 22/7 × ( 10.5 )²

= 3.465 c

Answer 2

Given that,

• A circumference of circle = 66cm

To Find :-

• Radius & Diameter of circle.

Solution :-

As we know that,

Circumference of the circle = 2πr

=> 66 = 2 × 22/7 × r ( °.° π = 22/7 )

=> 66 × 7 = 2 × 22 × r

=> 462 = 44 × r

=> r = 462 / 44

=> Radius = 10.5 cm.

Now,

Diameter = 2 × Radius

=> Diameter = 2 × 10.5

=> Diameter = 21cm.