Chapter 12.4, Problem 1GE

Two steel wires have the same length and are under the same tension. But wire A has twice the diameter of wire B. Which of the following is true? (a) Wire B stretches twice as much as wire A. (b) Wire B stretches four times as much as wire A. (c) Wire A stretches twice as much as wire B. (d) Wire A stretches four times as much as wire B. (e) Both wires stretch the same amount.