Maths-
General
Easy
Question
If there is an error of 0.02 sq. cm is made in calculating the area of a circle. If the radius is 5cm, then the percentage error in the circumference of the circle is
Hint:
% error in the circumference of the circle = 
The correct answer is:
Given :
Area of circle(A) = 
Differentiating 'A' w.r.t 'r'
0.02 = 
Circumference of circle(C) = 
C = 2 
C = 10
Differentiating 'C' w.r.t 'r'
% error in the circumference of the circle =
% error in the circumference of the circle = 
= 
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