An electron moves through a uniform magnetic field $$\vec{B} = B_0\hat{i} + 2B_0\hat{j}$$ T. At a particular instant of time, the velocity of electron is $$\vec{u} = 3\hat{i} + 5\hat{j} \text{ m s}^{-1}$$. If the magnetic force acting on electron is $$\vec{F} = 5e\hat{k}$$ N, where $$e$$ is the charge of electron, then the value of $$B_0$$ is ____ T.