From the top of a long smooth incline a small body A is projected along the surface with speed u. Simultaneously, another small object B is thrown horizontally with velocity `v = 10 m//s`, from the same point. The two bodies travel in the same vertical plane and body B hits body A on the incline. If the inclination angle of the incline is `theta = cos^(-1) ((4)/(5))` find
(a) the speed u with which A was projected.
(b) the distance from the point of projection, where the two bodies collide.
