Current Electricity

Charge passing through a conductor of cross-section $0.3 \mathrm{~m}^2$ is given by $q=\left(3 t^2+5 t+2\right) \mathrm{C}$ where $t$ is in seconds. The drift velocity at $t=2 \mathrm{~s}$ is (Concentration of electrons in the conductor $=2 \times 10^{25} \mathrm{~m}^{-3}$ )