Brass rod 30°c is observed to be 1m long when measured by a steel scale which is correct at 0°c .find the correct length of the brass rod at 0°c alpha of steel= 12×10^-6 and alpha of brass rod = 19×10^-6
Options
1) 1.0021m
2) 1.00021m
3) 1.021m
4) 1.000021m
