A target plane flies at 2100 meters. An anti-craft gun fires a projectile with an initial upward velocity of 200 m/sec. Will the projectile ever reach the altitude of the target plane?

The maximum altitude Y (= -0.5*gt
2
+ V0*sinϴ*T) of a projectile is given at the instant its speed (i.e y’) = 0
And, y’ = -gT + V0sinϴ ….(i)
Since, we need to check if the projectile will ever hit the plane, we need to check for its maximum value to
see if it is equal to or more than 2100,...