The ground state energy of hydrogen atom is -13.6ev the energy of second excited state of He⁺ ion in ev is:

According to Bohr’s model energy in nth state
                                = - 13.6 x $\frac{z^2}{n^2}$ ev
for second excited state, of He+, n = 3
 E3 ( He+)  = - 13.6 x $\frac{2^2}{3^2}$ ev 
                                =  - 6.04 ev