Charge passing through a conductor of cross-section area `A=0.3m^3` is given by in `q=3t^2+5t+2` coulomb, where t is in second. What is the value of drift velocity at t=2s?(Given, `n=2xx10^25/m^3`)

Options

A. `0.77xx10^(-5)m//s`
B. `1.77xx10^(-5)m//s`
C. `2.08xx10^(-5)m//s`
D. `0.57xx10^(-5)m//s`

Answer

B