A parallel plate capacitor has plate area 100 m^2 and plate separation of 10 m. The space between the plates is filled up to a thickness 5 m with a material of dielectric constant of 10. The resultant capacitance of the system is ‘x’ pF. The value of ε0 = 8.85 × 10^–12 F.m^–1. The value of ‘x’ to the nearest integer is……….