Revolve

1. Create the following parallel planeparallel plane:

   1. Select Wirerframe/Datum/Plane Parallel.
   2. Pick the following Plane:
      
   3. Select the following parameters for the plane, in the +X direction (meaning, the arrow pointing left):
      
   4. Press OK in the Feature Guide.

   

2. Now create the following sketch on the plane, making sure the arc is tangential to the part's upper edge as shown in the picture:
   

3. Create the following axisfollowing axis:

   1. Select Wireframe/Datum/Axis Parallel.
   2. Select the edge of the sketch indicated below:
      
   3. Left click on the base of the direction arrow and select Along Y.
   4. Enter a delta of 100 in the  -Y direction.
      

   

4. Select Solid > Creation > Revolve (Remove).

5. Pick the sketch and click the Middle Mouse Button followed by the axis.

6. Set the parameters as follows:
   

7. Click OK in the Feature Guide.