Image explains the SURFACE AREA OF A CYLINDER (area of the top and bottom plus the area of the wall) and the VOLUME OF A CYLINDER (area of top times the height).
Illustration ID: MATHS-CYLINDER-1
Russell Kightley
Illustration size: 25.0 Mpixels (71.5 MB uncompressed) - 5000x5000 pixels (16.7x16.7 in / 42.3x42.3 cm at 300 ppi)