**Solution:**

The given figure shows six equal amount of charges, q, at the vertices of a regular hexagon.

Where, Charge, q = 5 µC = 5 × 10^{- 6} C

Side of the hexagon, l = AB = BC = CD = DE = EF = FA = 10 cm

Distance of each vertex from centre O, d = 10 cm

Electric potential at point O,

V = 6 ×(q/4πεod)

Where,

εo = Permittivity of free space

Therefore, the potential at the centre of the hexagon is 2.7 × 10^{6} V.