A force is applied to a steel wire 'A', rigidly clamped at one end. As a result elongation in the wire is 0.2 \mathrm{~mm}. If same force is applied to another steel wire ' \mathrm{B} ' of double the length and a diameter 2.4 times that of the wire ' \mathrm{A} ', the elongation in the wire ' \mathrm{B} ' will be (wires having uniform circular cross sections)