A concrete column used in bridge construction is cylindrical in shape with a diameter of 1 meter. The column is completely poured in a short interval of time and the hydration of concrete results in the equivalent of a uniform source strength of 0.7 W/kg. Determine the temperature at the center of the cylinder at a time when the outside surface temperature is 75 degree Celsius. The column is sufficiently long so that temperature variation along its length may be neglected. For concreteAverage thermal conductivity = 0.95 W/m K

A concrete column used in bridge construction is cylindrical in shape

1.	A concrete column used in bridge construction is cylindrical in shape with a diameter of 1 meter. The column is completely poured in a short interval of time and the hydration of concrete results in the equivalent of a uniform source strength of 0.7 W/kg. Determine the temperature at the center of the cylinder at a time when the outside surface temperature is 75 degree Celsius. The column is sufficiently long so that temperature variation along its length may be neglected. For concrete Average thermal conductivity = 0.95 W/m K
A.	nAverage density = 2300 kg/m<sup>3</sup>
B.	190.92 degree Celsius
C.	180.92 degree Celsius
D.	170.92 degree Celsius
E.	160.92 degree Celsius
Answer» C. 180.92 degree Celsius