Cannon on a railroad car?

A cannon on a railroad car is facing in a direction parallel to the tracks (the figure below ). It fires a 98-kg shell at a speed of 105 m/s (relative to the ground) at an angle of 60 degrees above the horizontal. If the cannon plus car have a m of 4.5 *10^4 kg, what is the recoil speed of the car if it was at rest before the cannon was fired?