What solid is generated when the semicircle is rotated about the line?

The  solid which  is generated when the semicircle is rotated about the line is:

                          Sphere.

We know that when a semicircle is rotated about any line then the three dimensional figure or a solid that is formed on this rotation transformation is Sphere.

     Hence, the correct option is:

             Sphere.

( Also, a cylinder is obtained when a right triangle is rotated about a given line.

and a cylinder is obtained when a rectangle is rotated about a given line )

the answer is 0.3175 hope that you ^w^

also you might actually want to put this picture up if you want people to solve it luckily i remember this question