Question

find the length of the diameter of a circle whose circumference is 308 cm?​

Answer 1

Answer:

Circumference of a given circle is 63.8m

∴C=63.8m

Let the radius of the given circle be r m

Then,

C=2πrunits

r=

2

C

π

r=

2×

7

22

63.8

r=

2

63.8

×

22

7

r=(31.9×0.3182)

r=10.15m

∴ Diameter of the circle =2r=(2×10.15)=20.3cm

Answer 2

Explanation:

circumference=2 x 3.14 x r

308=2 x 3.14 x r

308/2 x 3.14 = r

r. =483.56

to find diameter=2 x 483.56

967.12