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Trajectory of particle in a projectile m...

Trajectory of particle in a projectile motion is given as `y=x- x^(2)/80`. Here, x and y are in meters. For this projectile motion, match the following with `g=10 m//s^(2)`.
`{:(,"Column-I",,"Column-II"),((A),"Angle of projection (in degrees)",(P),20),((B),"Angle of velocity with horizontal after 4s (in degrees)",(Q),80),((C),"Maximum height (in meters)",(R),45),((D),"Horizontal range (in meters)",(S),30),(,,(T),60):}`

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The correct Answer is:
`(A) rarr (R); (B) rarr (R); (C) rarr (P); (D) rarr (Q)`
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