Ans. The volume and surface area of the torus can be calculated if we know the radius of the circle, and the radius of the torus itself, which is the furthest portion of the circle from the line about which it is rotated. If the radius of the torus is given as 'r' and the radius of Circle is given an 'R', then the surface area of the torus is given by, whereas the volume of the torus is given by 2 π² Rr² where the value of pi is constant, and approximately equals to 3.14.