Hlo experts plz find solution for this

Solution :

The initial co ordinate of the particle is (3,7)

Initial x co ordinate is 3 units.
Initial y co ordinate is 7 units

As the body starts from rest so its initial velocity is zero.

The acceleration of the body along x axis is 4 units

The acceleration of the body along y axis is 0

So after 
3 seconds,

using equation of motion,
along x axis,
x = x_o + ut + at²/2
as u  = 0 and a  = 4 units t = 3 seconds

substituting we get,
s = 3 +  (4 x 3²)/2  = 21 units
 
As there is no motion along y axis so it will remain unchanged.
Hence the final co ordinates are: ( 21,7 )