Question

plz help me put in solving this problem

Answer 1

I have marked point A as the starting point of the particle and point B as the end point. At B the particle comes to rest.
Hence, particle​'s final velocity becomes 0.

Using the 3rd equation of motion in the vertical direction we can calculate the height attained by the particle at the end.

Furthermore, you can see the image for solution.

I hope you understand the concept. All the best!