Suppose that a copper hoop could be constructed to just fit around Earth's equator at a temperature of 31.8 �C?

What would be the THICKNESS OF SPACE BETWEEN THE HOOP & EARTH if the temperature of the hoop were increased by 0.8 �C? The radius of Earth is 6.376�106 m & the coefficient of linear expansion for copper is 17�10^-6(�C)^-1.