if i cut a body in half, after the application of heat to a body what will be the resultant temperature of the two halves

The temperature of both the halves of the body remain same and thus the body remain in thermal equilibrium.

Both the parts of the body even after being in contact with each other will not transfer heat and thus maintain equal temperature and the resultant of the two will be zero.

The resultant temperature of the two halves will be same as the temperature of the body before cutting them into two.

Explanation:

As the body of heated between cutting it into two halves, so the temperature of the body will be same even after cutting them into two halves. This can be confirmed from zeroth law of thermodynamics.

As the heat is stored in the form of temperature of the body when heated. The after cutting it into two halves, the temperature will be remained same as temperature does not depend on the mass of the object once the heating process is completed.

The temperature would have varied if the two halves were heated again but in this case after heat process is completed, the body is divided. This leads to no change in temperature of the two halves.