The surface area of a cell is 6 × side² and volume of a cubical cell is side³.
Surface area of cell having side 2 cm = 6 × 2 × 2 = 24 cm²
volume of the cell = 2 ×2 × 2 = 8 cm³
Therefore, surface area to volume ration is 24÷8 = 3 : 1
If the side of a cell is doubled, then
Surface area of cell = 6 × 4 × 4 = 96 cm²
volume of the cell = 4 × 4 × 4 = 64 cm³
Therefore, surface area to volume ration is 96 ÷ 64 = 3 : 2
Surface area to volume ratio decreases.
