Mathematics
Grade-7
Easy

Question

Find the diameter of the circular park having 143 yards as the circumference.

  1. 45
  2. 22.14  
  3. 22.75
  4. 45.5

hintHint:

The circumference of the circle is given by 2 cross times straight pi cross times straight r

The correct answer is: 45.5


    straight C equals 2 pi straight r comma
2 pi straight r equals 143 comma
2 cross times 22 over 7 cross times straight r equals 143 comma
straight r equals 143 cross times 7 over 22 cross times 1 half comma
straight r equals 22.75 text  yards.  end text
straight d equals 22.75 cross times 2 comma space
straight d equals 45.5

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