Problem

Find the percentage error in specific resistance given by

\rho = \frac{\pi r^2 R}{l}

where

r

is the radius having value

(0.2 \pm 0.02) \text{ cm}

R

is the resistance of

(60 \pm 2) \text{ ohm}

and

l

is the length of

(150 \pm 0.1) \text{ cm}