Two stars  of masses $3\times {10}^{31}$ kg each, and at distance $2\times {10}^{11}$ m rotate in a plane about meteorite passes through O moving perpendicular to the star's rotation plane. In order to escape from the gravitation field of this double star, the minimum speed that meteorite should have at O is:
(Take Gravitational constant $G=6.67\times {10}^{-11}{Nm}^2{Kg}^{-2}$)