JEE Advanced 2019 Paper 1

A block of weight 100N is suspended by copper and steel wires of same cross sectional area 0.5cm2 and length √3m and 1m, respectively. Their other ends are fixed on a ceiling as shown in figure. The angles subtended by copper and steel wires with ceiling are 30º and 60º, respectively. If elongation in copper wire is (Δlc) and elongation in steel wire is (Δls) ,then the ratio

Δlc

Δls

is_______
[Young’s modulus for copper and steel are 1×1011N/m2 and 2×1011N/m2 respectively.]