Question

the circumference of a circle is 22cm.find its radius and diameter​

Answer 1

Answer:

radius of circle is 3.5 and diameter is 7

Hope it helps you...

Answer 2

Answer:

Given :-

• The circumference of a circle is 22 cm.

To Find :-

• What is the radius and diameter.

Formula Used :-

${\red{\boxed{\large{\bold{Circumference\: of\: circle\: =\: 2{\pi}r}}}}}$

${\red{\boxed{\large{\bold{Diameter\: =\: 2 \times r}}}}}$

Solution :-

➦ To find radius of a circle,

Given :

• Circumference = 22 m

According to the question by using the formula we get,

⇒ $\sf 2 \times \dfrac{22}{7} \times r =\: 22$

⇒ $\sf r =\: \dfrac{22 \times 7}{2 \times 22}$

⇒ $\sf r =\: \dfrac{\cancel{154}}{\cancel{44}}$

⇒ $\sf r =\: \dfrac{7}{2}$

➠ $\sf\bold{\purple{r =\: 3.5\: cm}}$

$\therefore$ The radius of a circle is 3.5 cm .

➦ To find diameter of a circle,

Given :

• Radius = 3.5 cm

According to the question by using the formula we get,

↦ $\sf Diameter =\: 2 \times 3.5$

➤ $\sf\bold{\green{Diameter =\: 7\: cm}}$

$\therefore$ The diameter of a circle is 7 cm .