Atoms (Bohr Model)

In the first excited state of the hydrogen atom, the energy of its electron is -3.4 eV. The radial distance of the electron from the hydrogen nucleus in this case is approximately: (Take 1 eV = 1.6 x 10^-19 J, e = 1.6 x 10^-19 C and 1/(4 pi epsilon0) = 9 x 10^9 N m^2/C^2)