TS EAMCET 06 May 2019 Shift 1 Solved Paper

A copper wire and an aluminium wire have lengths in the ratio 5:2. diameters in the ratio 4:3 and forces applied in the ratio 4:5. Find the ratio of increase in length of the copper wire to that of aluminium wire.
(Let YCu = 1.1 × 1011Nm−2 , YAl = 0.7 × 1011Nm−2)