Which among the following is true of a sphere, a cube and circular plate of same material and same mass heated to same temperature?

Q. Which among the following is true of a sphere, a cube and circular plate of same material and same mass heated to same temperature?

A.            Sphere cools the slowest

B.            Circular plate cools the fastest

C.            Cube cools the fastest

D.            Circular plate cools the slowest

Answer: Circular plate cools the fastest