Question 258858
Their distances travelled will be the legs of a right triangle.
The distance between them will be the hypotenuse.
rt=d
It will be multiple of the 3,4,5 triangle
{{{sqrt((rt)^2+(rt)^2))}}}
{{{sqrt((20t)^2+(15t)^2))}}}
{{{sqrt(400t^2+225^2)}}}={{{sqrt(625t^2)}}}=25t
25t=d