A 6.30 x 10 -5 H solenoid is constructed by wrapping 54 turns of wire around a cylinder with a cross-sectional area of 6.4 x 10-4 m2. When the solenoid is shortened by squeezing the turns closer together, the inductance increases to 7.70 x 10-5 H. Determine the change in the length of the solenoid.