Question

Heyaa !!!
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need help...
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answer this :-

If the circumference of a circle sheet is 154 m, find the radius. Also find the area of the sheet.
(Take π = 22/7)
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:-) :-) Thnx :-) :-)
:-) :-) Be happy :-) :-)

Answer 1

Let the radius be ‘r’ metre

Circumference=2πr=154 m (given)

$= > 2 \times \frac{22}{7} \times r = 154$


$= > \frac{44}{7} \times r = 154$


$= > r = \frac{154 \times 7}{44}$



$= > r = \frac{49}{2} \: metre$


$= > r = 24.5 \: metre$


So, As it a circular sheet, the area will be πr²

$= \frac{22}{7} \times ( \frac{49}{2} ) {}^{2}$


$= \frac{22}{7} \times \frac{2401}{4}$


$= \frac{3773}{2} \: square \: metres$



$= 1886.5 \: square \: metres$

Answer 2

Question :

If the circumference of a circle sheet is 154 m, find the radius. Also find the area of the sheet.

(Take π = 22/7)

Answer :

Given :

Circumference = 154 metre

To find :

Radius = ?

Area of circular sheet = ?

Step by step explanation :

We know that,

$\tt{Circumference = 2πr}$

$\tt{154 = 2\times \frac{22}{7}\times r}$

$\tt{154 \times 7 = 2 \times 22 \times r}$

$\tt{\frac{1078}{44} = r}$

$\tt{24.5= r}$

Radius of the circle sheet is 7 m.

Now,

$\tt{Area\:of\:the\:circle= \pi \:r {}^{2}}$

$\tt{ =22 \times 3.5 \times 24.5}$

$\tt{= 1886.5 \: m {}^{2}}$

Hence,

Radius = 24.5 m

Area = 1886.5 sq.m

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