Answer:
option (a). The surface area and volume of a body of rotation
is the correct option
Step-by-step explanation:
Theorems of Pappus and Guldinus are used to find the surface area and volume of a revolving body. It is neither applicable for surface areas and volumes of a symmetric body nor it helps to find the overall mass of any body. Thus, it can help to calculate the surface area and volume of any body rotated in 2-D frame(or any 2-D curve).
It is given or calculated as the product of area, perpendicular distance from the axis and length of the 2-D curve.