A bullet is fired at an angle of 30 degree with the horizontal hits the ground 3 kilometer away. By adjusting its angle of projection can one hope to hit a target of 5 kilometer away? Assume the muzzle speed to be fixed and neglect air resistance.

We do not 'give' answers. We give advice and help. You have to do the work.

How can we help you (short of doing the work for you?)

What's you best estimate?