One end of a steel wire of radius .r. is fixed to a ceiling and a load of 3 kg is attached to the free end of the wire. Another wire made of copper of radius .2r. is attached to the bottom of 3 kg load and a 2 kg load is attached to the free end of the copper wire. The ratio of longitudinal strains produced in copper and steel wires is
(Young modulus of steel `=20xx10^(10)Nm^(-2)`)
(Young modulus of copper `=12xx10^(10)Nm^(-2)`)

Options

A. `6:1`
B. `1:6`
C. `2:3`
D. `3:2`

Answer

2