Answer :

(1). Given: Circumference = 198 cm


And we know circumference of a circle is given by,


Circumference = 2πr



Substituting Circumference = 198 cm and π = 22/7,





If radius, r = 31.5 cm


Then diameter = 2r


diameter = 2 × 31.5 = 63


We can draw the circle as



Hence, radius is 31.5 cm and diameter is 63 cm.


(2). Given: Circumference = 616 cm


And we know circumference of a circle is given by,


Circumference = 2πr



Substituting Circumference = 616 cm and π = 22/7,





If radius, r = 98 cm


Then diameter = 2r


diameter = 2 × 98 = 196


We can draw the circle as



Hence, radius is 98 cm and diameter is 196 cm.


(3). Given: Circumference = 72.6 m


And we know circumference of a circle is given by,


Circumference = 2πr



Substituting Circumference = 72.6 m and π = 22/7,





If radius, r = 11.55 cm


Then diameter = 2r


diameter = 2 × 11.55 = 23.1


We can draw the circle as



Hence, radius is 11.55 m and diameter is 23.1 m.


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