A rocket is launched normal to the surface of the Earth, away from the Sun, along the line joining the Sun and the Earth. The sun is  3×105 times heavier than the Earth and is at a distance 2.5×104 times larger than the radius of the Earth. The escape velocity from Earth’s gravitational field is ve=11.2 km s−1. The maximum initial velocity vs required for the rocket to be able to leave the sun-Earth system is closest to (ignore the rotation and revolution of the Earth and the presence of any other planet)