A steel scale calibrated at 25 C has been employed to

Last updated: 6/11/2023

A steel scale calibrated at 25 C has been employed to measure the length of a copper pipe at 25 C However the reading has been taken at 65 C If thermal coefficient of linear expansion of steel and copper are 3 x 10 5 per C and 2 10 5 per C respectively then percentage error in reading taken is 1 0 01 3 0 04 2 0 02 4 0 05