What should be the sum of lengths of an aluminium and steel rod at `0^(@)C` is, so that all the temperature their difference in length is `0.25m`. (Take coefficient of linear expansion for aluminium and steel at `0^(@)C` as `22 xx 10^(-6)//.^(@)C` and `11 xx 10^(-5)//.^(@)C` respectively.)

Answer

`0.75 m`