A square is expanding with its area increasing at a rate of 115 (in ^ 2)/(min) when its each edge is 13 in. At what rate is the length of each edge changing at that moment?

Question

Please help me answer this question

Answer 1

A(t)=x²(t)

dA/dt=2*x(t)*dx/dt

115=2*13*dx/dt at x=13

dx/dt=115/26 at x=13