2 very small conducting spheres,each of mass 1x10^-4 kg are suspended at common point by very thin filament?

2 very small conducting spheres,each of mass 1x10^-4 kg are suspended at common point by very thin filament oF length 0.2m. a charge Q coulomb is placed on each sphere. the electric force of repulsion separates the spheres and an equilibrium is reached when suspending filaments make an angle of 10 degrees. assume g=9.8n/kg and negligible mass for filaments, FIND Q?