A copper disc of diameter 300 mm at 20^(0)C has a concentric hole of diameter 10 cm. Determine the external and internal diameters of the disc when the temperature is raised to 60^(0)C. (alpha of copper =17xx10^(-6)//""^(0)C)

A copper disc of diameter 300 mm at 20^(0)C has a concentric hole of d

1.	A copper disc of diameter 300 mm at 20^(0)C has a concentric hole of diameter 10 cm. Determine the external and internal diameters of the disc when the temperature is raised to 60^(0)C. (alpha of copper =17xx10^(-6)//""^(0)C)
Answer» ANSWER :300.204 MM; 100.068 mm