A particle P projected from a point O on horizontal ground hits the ground after 2.4 seconds. The horizontal component of the initial velocity of P is 5/3 d ms-1 (a) Find, in terms of d, the horizontal distance of P from O when it hits the ground. (b) Find the vertical component of the initial velocity of P. P just clears a vertical wall which is situated at a horizontal distance d meter from O. (c) Find the height of the wall.

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