Question

The circumference of a circle is 198 cm. Find its radius and diameter

Answer 1

hope u understand this

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Answer 2

Radius = 31.5 cm

Diameter = 63 cm

Step-by-step explanation:

The formula for circumference of a circle is given below:

$C=2\pi r$

where r is the radius and $\pi=\frac{22}{7}$

It is given that Circumference = 198cm

$\Rightarrow C=2\pi r$

Substituting the known values

$\Rightarrow 198=2\times \frac{22}{7}\times r\\\\\Rightarrow 198=\frac{44}{7}\times r$

Cross multiply

$\Rightarrow r=\frac{198\times 7}{44} \\\\\Rightarrow r=\frac{1386}{44} \\\\\Rightarrow r = 31.5cm$

Diameter of a circle is twice the radius

That is

Diameter = 2×r

               =2×31.5

              =63 cm

Learn More:

If the circumference of a circle is 132 CM then the find the diameter of circle of a circle.

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