Question

find the circumference of the circle with diameter 7.5 cm in meters . ( take pie as 3.14 ) . ANSWER IN METHOD​

Answer 1

Answer:

Circumference of the circle = 0.2355m²

Step-by-step explanation:

Given :

Diameter = 7.5 cm

Pi = 3.14

To find :

The circumference of the circle

Taken :

To find the circumference of the circle use this formula -:

$\boxed{\sf{C=2\pi r}}$

Where,

C = Circumference

r = Radius

So , the radius = 7.5 cm/2 = 3.75cm

Solution :

$:\implies\sf{C=2\times3.14\times3.75}$

$:\implies\sf{C=6.28\times3.75}$

$:\implies\sf{C={23.55cm}^{2}}$

In meters

$:\implies\sf{C=0.2355{m}^{2}}$

So , the circumference is 0.2355m² .

Extra information :

▪︎To find the area of the circle -:

$\boxed{\sf{A=\pi{r}^{2}}}$

Where,

A = Area of the circle

r = Radius

▪︎To find the radius of the circle when circumferenceis given -:

$\boxed{\sf{r=\dfrac{C}{2\pi}}}$

Where,

r = Radius

C = Circumference

▪︎To find the radius of the circle when area is given -:

$\boxed{\sf{r=\sqrt{\dfrac{A}{\pi}}}}$

Where,

r = Radius

A = Area of the circle

Answer 2

Answer:

0.2355m

Explanation:

The radius=7.5cm/2=3.75 CM

circumference=2×3.75

circumference=6.28×3.75

circumference=23.55cm

meters = 0.2355m