Mark the correct alternative in the following:
The circumference of a circle is measured as 28 cm with an error of 0.01 cm. The percentage error in the area is
given that circumference is = C = 2πr = 28 cm
That’s mean r=14/π
ΔC = 2πΔr = 0.01
Δr = (0.01/2π)
We all know that area of a circle is = A =πr2
ΔA= 2πr×dr
So finally,
= 1/14
1