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 )

hello :

by applying the distributive property :

6 × 4.3 = 6 × ( 4 + 0.3 )

            =   (6 ×   4) + (6 ×   0.3)

            = 24 + 1.8

6 × 4.3 = 25.8