Question

Find the radius of the circle whose diameter is:‐            (05)

(1)   14 cm    (2)   18 cm    (3)   20 cm    (4)   12 cm    (5)   10 cm​

Answer 1

(i) Given radius = 14cm

We know that the circumference of the circle = 2 π r

π value is 22/7

C = 2 × (22/7) × 14

C = 88cm

(ii) Given radius = 10m

We know that the circumference of the circle = 2 π r

C = 2 × (22/7) × 10

C = 62.86 m

(iii) Given radius = 4km

We know that the circumference of the circle = 2 π r

C = 2 × (22/7) × 4

C = 25.142 km