Cell Membrane and Transport Quiz (1) Biology AS Level

A red indicator solution was mixed with agar and the resulting solid was cut into small cylindrical blocks. The blocks were placed in an acid which turns the indicator yellow and all other variables were kept constant. The dimensions of the blocks are shown.
block 1 height 3 mm diameter 6 mm
block 2 height 6 mm diameter 12 mm
block 3 height 8 mm diameter 16 mm
The formula for calculating the surface area of a cylinder…