Mathematics
Grade-7
Easy

Question

Determine the area of the circle having 21 cm as radius.

  1. 125
  2. 1254
  3. 1546
  4. 1386

hintHint:

area of circle = πr squared

The correct answer is: 1546


    text italic Area of circle (A) =  end text pi r to the power of italic 2
A italic equals italic 22 over italic 7 italic cross times italic 21 italic cross times italic 21 italic space italic space italic space italic space italic left parenthesis italic space H e r e italic space straight pi equals space 22 over 7 right parenthesis
A italic equals italic 22 italic cross times italic 3 italic cross times italic 21
A italic equals italic 1386 text italic  square centimeter.  end text

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