In the first the circumference of the circle is 14 cm.....

Dear Student,

Given, Circumference of the Circe, C = 14 cm.
We know that the Circumference of the Circe is given by = 2πr, where r is the radius of the circle.
Therefore, 2πr = 14 cm

⇒ r = $\frac{14}{2\pi }= \frac{14 *7}{2*22} = \frac{98}{44}$   cm  = 2.23 cm           [ Take π = 22/7 ]

So,(i) Diameter of the circle, D = 2*r= 2*2.23 = 4.46 cm

(ii) Ratio = $\frac{C}{D} = \frac{14}{4.46}$   =   3.14 cm
(iii) Area of the circle = πr² =     $\frac{22*2.23*2.23}{7}$       =  15.63 cm²
(iv) Perimeter of the circle = Circumference of the circle = 14 cm

Regards