World Languages, asked by nandan924, 6 months ago

who knows the answer
plz give the correct answer​

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Answers

Answered by aparnayadav66
2

Answer:

1) 154 units and 44 units

is right

Answered by MoodyCloud
4
  • (1) option is correct. Area is 154 units and circumference is 44 units.

Explanation:

Given:-

  • Radius of circle is 7 units.

To find:-

  • Area of circle.
  • Circumference of circle.

Solution:-

Diagram of circle :-

\setlength{\unitlength}{1cm}\begin{picture}\thicklines\qbezier(2.3,0)(2.121,2.121)(0,2.3)\qbezier(-2.3,0)(-2.121,2.121)(0,2.3)\qbezier(-2.3,0)(-2.121,-2.121)(0,-2.3)\qbezier(2.3,0)(2.121,-2.121)(-0,-2.3)\put(0,0){\line(1,0){2.3}}\put(0.5,0.3){\bf\large 7 units}\end{picture}

Now,

 \boxed{\sf \bold{Area \: of \: circle = \pi r^{2}}}

  • Where, r is radius of circle.

Put r in formula :

 \sf \longrightarrow  \dfrac{22}{7}  \times  {(7)}^{2}  \\  \\

 \sf \longrightarrow  \dfrac{22}{ \cancel{7}}  \times  \cancel{7} \times 7 \\  \\

 \sf \longrightarrow 22 \times 7 \\  \\

 \sf \longrightarrow  \purple{ \boxed{ \sf \bold{154}} \bigstar}

Thus,

Area of circle is 154 units sq.

 \boxed{\sf \bold{Circumference \: of \: circle = 2 \pi r}}

Put r in formula :

 \sf \longrightarrow 2 \times  \dfrac{22}{ \cancel{7}}  \times  \cancel{7} \\  \\

 \sf \longrightarrow \red{ \boxed{  \sf  \bold{44}}\bigstar}

Therefore,

Circumference of circle is 44 units.

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