In a cross sectional view they will now form a slimm triangle with the outer diameter as its apex and {HEAD ~ the central cylinder wall} as {TAIL ~ its base} 
In a cross sectional view they will now form a slimm triangle with the outer diameter as its apex and { HEAD ~ the central cylinder wall } as { TAIL ~ its base }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL