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Question 3
If the circumference of a circular sheet is 154 m, find its radius. Also, find the area of the sheet. (Take π=227)
 


Solution

Given: Circumference of the circular sheet = 154 m
We know that, circumference of the circle = 2πr 
  2πr = 154m
  r = 1542π
   r = 154×72×22 = 24.5 m
Now, area of circular sheet = πr2
= 227×24.5×24.5=1886.5 m2
Thus, the radius and area of circular sheet are 24.5 m and 1886.5 m2 respectively.


Mathematics
NCERT Textbook
Standard VII

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