The horizontal initial velocity is

and the vertical initial velocity is

.

The horizontal velocity remains the same throughout the bullets flight since there is no acceleration in thex-direction after the bullet is fire. But the velocity in they-direction is changing because of the acceleration due to gravity. Initially this is downward (in the opposite direction of the vertical velocity) and the velocity as a function of time is governed by the equation: where .

Also thex-position of the bullet is while they-position is .

So after 1 second the bullet has traveled in thex-direction and in they-direction. So you might say that the bullet is at the position (90,115.1)

Now the target is moving in both thexandydirections. The speed is constant. so after 1 second the target has moved 90m vertical and 90m horizontal putting its position after 1 second at exactly (90,115.1), which is where the target is.