Question

the circumference of a circle is 136 cm what is the radius and the area

Answer 1

Circumference of circle = 2πr

2πr = 136 cm

2 × 3.14 × r = 136 cm

6.28 × r = 136 cm

r = 21.65 cm

Therefore, r = 21.65 cm

Area of circle = πr^2

= 3.14 × (21.65)^2

= 3.14 × 468.72

= 1,471.78 cm^2

Therefore, the area of circle is 1471.78 cm^2

Answer 2

Given,

Circumference of the Circle = 136 cm

We know,

                  Circumference = $2\pi r$

Where,  

                      r is the radius and π = 3.14

Now As per the question,

$136 = 2\pi r\\\\136 = 2*3.14*4\\\\r = 21.65 cm$

We know,  

                    Area of the Circle =  π$r^{2}$              

                                                    = $= 3.14*(21.65)^2$

                                                     = 1471.78$cm^2$

Thus,

the Radius of Circle = 21.65 cm

        The area of Circle = 1471.78$cm^2$