i. Radius (r) = 7 cm
Diameter (d) = 2r
= 2 x 7 = 14 cm
Circumference (c) = πd
= 22/7 x 14
= 44 cm
ii. Diameter (d) = 28 cm
Radius (r) = d/2 = 28/2 = 14 cm
Circumference (c) = πd
= 22/7 x 28
= 88 cm
iii. Circumference (c) = 616 cm
∴ πd = 616
∴ 22/7 x d = 616
∴ d = 616 x 7/22
∴ d = 196 cm
∴ Diameter (d) = 196 cm
Radius (r) = d/2 = 196/2 = 98 cm
iv. Circumference (c) = 72.6 cm
∴ πd = 72.6
∴ 22/7 x d = 72.6
∴ d = 72.6 x 7/22
= 726/10 x 7/22
= (33 x 7)/10
∴ d = 23.1 cm
∴ Diameter (d) = 23.1 cm
Radius (r) = d/2 = 23.1/2
= 11.55 cm
| Sr. No. |
Radius (r) |
Diameter(d) |
Circumference (c) |
| i. |
7 cm |
14 cm |
44 cm |
| ii. |
14 cm |
25 cm |
88 cm |
| iii. |
98 cm |
196 cm |
616 cm |
| iv. |
11.55 cm |
23.1 cm |
72.6 cm |
