Two steel guitar strings have the same length. String A has a diameter of $0\mathrm{.}57$ mmmm and is under $450\mathrm{.}0$ NN of tension. String B has a diameter of $1\mathrm{.}0$ mmmm and is under a tension of $850\mathrm{.}0$ NN $.$

Part A

Find the ratio of the wave speeds, vA$/$vBvA$/$vB$,$ in these two strings.