Two seconds after projection, a projectile is travelling in a direction inclined at `30^@` to the horizontal. After one more second, it is travelling horizontally. Find the magnitude and direction of its velocity.

Two second after projection, a projectile is travelling in a direction inclined at 30^(@) to the horizontal. After one more second, it is travelling horizontally. Find the magnitude and direction of the velocity of projection.

Two seconds after projection, a projectile is travelling in a direction inclined at 30^(@) to the horizon. After one more second it is travelling horizontally. Then