Question

Find the diameter of the circle whose circumference is 100cm

Answer 1

Answer:

31.8 cm

Step-by-step explanation:

circumference = 100 cm

A.T.Q

2πr=100cm

2* 22/7 *r =100cm

r=100*7/2*22

r=15.9cm ( approx)

so, diameter= 15.9*2

31.8 cm (approx.)

Answer 2

Answer:

Diameter of the circle = 31.82cm

Step-by-step explanation:

Given,

Circumference of the circle =  100cm

To find,

The diameter of the circle

Recall the formula,

The circumference of the circle = 2πr,

The diameter of the circle = d = 2r, where 'r' is the radius of the circle.

Solution:

Since the circumference of the circle is 100cm, we have

2πr = 100

πr = 50

r = $\frac{50}{\pi }$

r = $\frac{50}{\frac{22}{7} }$ (since π = $\frac{22}{7}$)

r= $\frac{50X7}{22}$

r = 15.91

Radius of the circle = 15.91cm

Diameter of the circle = 31.82cm

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