Percentage error in volume
\(\frac{{\Delta V}}{V} \times 100 = \frac{{2\Delta r}}{r} \times 100 + \frac{{\Delta l}}{l} \times 100\)
\( = \left( {2 \times \frac{{0.01}}{{2.0}} \times 100 + \frac{{0.1}}{{5.0}} \times 100} \right)\)
\( = (1 + 2)\% \) =\(3\% \)