Physics Problem please help!?

A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 4.97 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 25° when they move past the window, as the drawing shows. How fast is the train moving? a href="http://edugen.wiley.com/edugen/courses/crs1507/art/qb/qu/c03/ch03p_70.gif" rel="nofollow"http://edugen.wiley.com/edugen/courses/c…/a