An iron scale is correct at `0^(@)C` an at this temperature, a zinc rod measures `1m` on this scale. What will be the length of the zinc rod as measured by the iron scale when both the are at `100^(@)C`? (Linear expansivity of zinc `=126xx10^(-6)K^(-1)` and linear expansivity of iron `=12x10^(-6)K^(-1)`)
