Question

If error in measuring diameter of a circle is $4\$, the error in circumference of the circle would be

• A. $2\%$
• B. $8\%$
• C. $4\%$
• D. $1\%$

Answer 1

Answer: (C)

$4\%$

Answer 2

Circumference, $\left(s\right)=2\pi r=2\pi \frac{D}{2}=\pi D$ $\therefore \frac{ds}{s}\times100\%=\frac{dD}{D}\times100\%=4\%$