A projectile is launched with an initial velocity of 1.5km/s^-1 at an angle theta the target is located at a distance of 3000m and on the same level. The projectile strikes the target after 4.0sa.determine the horizontal velocity of the projectileb.calculate the value of theta

range=u2sin2$\theta$/2g
by above formula you will get $\theta$
then ucos$\theta$ is the horizontal velocity