Integration Edexcel

Hi, when doing harder integration questions, I often find ones where there is reference to rotation in the x-axis, such as in the image I’ve attached, which reads,
“Region R is rotated through 2pi radians about the x-axis”
Could anyone explain how to interpret this, as I honestly have no clue. I don’t think I’d struggle with the actual integration part
Also, could a question like this come up in Edexcel A-Level Maths?

Volumes of revolution (so rotate an area about the x or y axis) are now in further maths. Just check the spec of each. It/they may be old questions if theyre being asked for normal a level maths.