Mathematics
Grade-7
Easy

Question

The circumference of a circular field is 12 meters. Determine the area of the rug.

  1. 11.42
  2. 13.08
  3. 15.24
  4. 10.18

hintHint:

circumference = 2πr

The correct answer is: 13.08


    c i r c u m f e r e n c e space o f space a space c i r c u l a r space f i e l d space i s space 12 space m e t e r s space g i v e n
C equals 2 pi r
2 pi r equals 12
2 cross times 3.14 cross times r equals 12
r equals fraction numerator 12 over denominator 6.28 end fraction
straight r equals 1.91
text  Area  end text equals pi r squared
equals 3.14 cross times 1.91 squared
equals 3.14 cross times 3.64
equals 11.42 text  square end text text  meter end text

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