Aparticle is moving along the curve y= 5sqrt(5x+4) . as the particle passes through the point (1,15), its x-coordinate increases at a rate of 4 units per second. find the rate of change of the distance from the particle to the origin at this instant.

The question ask to find the rate of change of the distance from the paticle to the origin at this instant where as a particle is moving along the curve y = 5sqrt(5x+4) and base on my calculation, I came up with an answer of 254/sqrt(226). I hope you are satisfied with my answer and feel free to ask for more