mumtazmahal861 mumtazmahal861
  • 14-03-2022
  • Mathematics
contestada

The area of a circle is 65.71cm2.
Find the length of the radius rounded to 2 DP.

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RevyBreeze
RevyBreeze RevyBreeze
  • 14-03-2022

Answer:

5 cm

Step-by-step explanation:

Area of a circle: [tex]\pi r^{2}[/tex]  {r=radius}

[tex]\pi r^2=65.71cm2[/tex]

[tex]r^2=65.71/3.14[/tex] [tex](\pi =3.14)[/tex]

[tex]r^2=20.92[/tex]

[tex]r=\sqrt{20.92} =4.57cm[/tex]

[tex]r=4.57=5cm[/tex]

[tex]r=5cm[/tex]

[RevyBreeze]

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