Question

Find the radius of a circle whose circumference is :-

(1) 52.8 cm

(2) 42 cm

(3) 6.6 km

please give the answer with solution!!!​

Answer 1

Answer:

Given circumference, C = 52.8 cm

We know that the circumference of the circle = 2 π r Therefore radius, r = C/2 π r = (52.8 × 7)/ (2 × 22) r = 369.6/ 44 r = 8.4 cm

(ii) Given circumference, C = 42 cm We know that the circumference of the circle = 2 π r Therefore radius, r = C/2 π r = (42 × 7)/ (2 × 22) r = 294/ 44 r = 6.68 cm

(iii) Given circumference, C = 6.6 km We know that the circumference of the circle = 2 π r Therefore radius, r = C/2 π r = (6.6 × 7)/ (2 × 22) r = 46.2/ 44 r = 1.05 km

Answer 2

Answer:

1. 26.4 cm
2. 528/2= 26.4
3. 42/2=21
4. 6.6/2=3.3 cm