Question

A circular swimming pool has a diametrr of 42 metres. Find its circumference​

Answer 1

Answer:

Circumference of the circular swimming pool   = 132m.

SOLUTION

Diameter of the circular swimming pool = 42m.

$\sf Radius = \dfrac{Diameter}{2}$

Radius of the circular swimming pool = 42/2 = 21m.

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Circumference of Circle = 2πr (Where 'r' is the radius of the circle).

Here,

r = 21m.

$\implies \sf Circumference \: of \: circular \: swimming\: pool = 2 *\dfrac{22}{7} * 21$

$\implies$ Circumference of the circular swimming pool = 2 × 22 × 3

$\implies$ Circumference of the circular swimming pool = 132m.

PERIMETER OF 3 MOST COMMON SHAPES

1.RECTANGLE

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PERIMETER = 2(l+b) , Where l is the length and b is the breadth .

2.Square

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PERIMETER = 4a , Where 'a' is the side of the square.

3.Triangle

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PERIMETER = a + b +c

Answer 2

To find :-

• Circumference of the circular swimming pool.

Given :-

• Diameter of the circular swimming pool = 42 meters

How can we find the αnswer :-

• Here we have diameter of the circular swimming pool firstly we will convert diameter of the circular swimming pool to radius of the circular swimming pool and the by using the formula .

Let's do

$\boxed{\red{\:\mathsf{Radius \:=\:\dfrac{Diameter}{2}}}}$

Radius  =  42/2

Radius = 21 meters

Finding circumference of the circular swimming pool :-

$\longmapsto\mathsf{Circumference \:of\: the\: circle\: =\: 2\:\pi \:r}$

$\longmapsto\mathsf{Circumference \:of\: the\: circle\: =\: 2\times\:\dfrac{22}{7}\:\times\:21}$

$\longmapsto\mathsf{Circumference \:of\: the\: circle\: =\: 2\times\:22\:\times\:3}$

$\longmapsto\mathsf{Circumference \:of\: the\: circle\: =\: 44\:\times\:3}$

$\longmapsto\mathsf{Circumference \:of\: the\: circle\: =\:132m }$

So the circumference of the circular swimming pool is 132m

αnswer :-

$\boxed{\mathsf{\bigstar\:\:Circumference\:of\:the\:circular\:swimming\:pool\:=\:132m\:\:\bigstar}}$