• Math

  Circle

  Posted by Lucky Chauhan on June 23, 2023 at 4:34 pm

  What will be the circumference of a circle whose area is 616 cm sq.?

  Saloni Bhardwaj replied 1 year, 5 months ago 3 Members · 2 Replies

  • besic question
  • circle
• 2 Replies

• 

  Pooja

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  June 23, 2023 at 4:49 pm

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  ::

  Given: Area of a circle(A)=616 sq.cm

  To find : Circumference of circle(c)

  Solution:Area of a circle

  A= πr^2

  Where r is the radius of a circle

  616=(22/7) r^2

  r^2=616*(7/22)=28*7=196

  r^2=196

  Taking square root on both the sides, we get

  r=14

  Thus, circumference of the circle is

  c= 2πr=2*(22/7)*14=88

• 

  Saloni Bhardwaj

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  June 23, 2023 at 4:50 pm

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  Circumference of a circle is given by: P=2*pi*radius

  Area of a circle is given by: A=pi*radius^2

  Given, area of the circle A=616 cm sq.

  i.e. pi*radius^2=616

  => radius^2=196.078

  => radius=14 cm

  Therefore,

  Circumference=2*pi*14

  =87.96 cm

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