from the newtons equation of motion :
considering vertical projection initial velocity is = 0
estimated distance = horizontal velocity x time taken to hit the ground
for vertical motion the initial velocity =0 , assuming acceleration is 9.8 m/s
final velocity velocity with which the shell hits the target and the direction of shell at the time of hitting the target is obtained by the formula
horizontal velocity will be kept constant at 25 m/s
but there will be downward acceleration of the shell to attain a maximum velocity of 62. 61 m/s at the time of hitting the target.