Hello Candidate,

At first, please mention that the object starts from rest so the initial velocity will be equal to zero.

Now, it acts under the influence of a constant force which they produce a constant acceleration in the motion. The distance covered in first 10 seconds is S1, and in the next 10 seconds The distance covered is S2.

So, from the three equations of motion you can find various terms-

V=u+at, v^2-u^2=2as, s=ut+1/2×a×t^2.

Hope It helps!!