Question : A bullet fired at an angle of 30° with the horizontal hits the ground 3/√3 km away. Can we hit a target at a distance of 6 km by adjusting its angle of projection?
Doubt by Yana
Solution :
θ=30°
R=3/√3 km = √3 km
We know,

R=3/√3 km = √3 km
We know,

u²=2g — (1)
Also,
Maximum Range of projectile is given by

Also,
Maximum Range of projectile is given by

Since the maximum range of the projectile is just 2 km, so we can't hit the target which is 6 km away by just adjusting its angle of projection.