Two seconds after projection, a projecti...

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. Then

the velocity of projection is 20 m/s

the velocity of projection is `20sqrt3` m/s

the angle of projection is `45^@` with vertical

the angle of projection is `30^@` with horizontal

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