The rate of First order reaction is 0.04 mol L^-1 s^-1 at 10 minutes and 0.03 mol L^-1 s^-1 at 20 minutes after initiation. Half life of the reaction…

The rate of First order reaction is $\displaystyle 0.04 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$ at $\displaystyle 10$ minutes and $\displaystyle 0.03 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$ at $\displaystyle 20$ minutes after initiation. Half life of the reaction is $\displaystyle \_\_\_\_$ minutes. (Given $\displaystyle \log 2=0.3010$, $\displaystyle \log 3=0.4771$ )