A steel tape 1 metre long is correctly calibrated for temperature of `27.0^@C`. The length of a steel rod measured by this tape is found to be 63.0 cm on a h ot day when the temperature is `45^@C`. What is the actual length of the steel rod on that day? What is the length of the same steel rod on a day when the temperature is `27.0^@C`? Coefficient of linear expansion of steel `= 1.20 xx 10^-5 C^-1`.