A steel scale measures the length of a copper rod as 80 cm when both are at 20°C, the calibration temperature of the scale. What would the scale read for the length of the rod when both are at 40°C?
Given coefficient of linear expansion of steel = 1.1×10^-5 °C^-1
Coefficient of linear expansion of copper = 1.7×10^-5 °C^-1
a. 80.0096 cm
b. 80.0272 cm
c. 1 cm
d. 25.2 cm