The diagram gives the measurements of two agar blocks. It has been drawn to scale. Both agar blocks were coloured pink using a pH indicator. Under acidic conditions, the pink pH indicator turns colourless. The two agar blocks were put into a beaker of acid at the same time. As the acid diffused into the blocks, they became colourless. What is the surface area to volume ratio of the block that turned completely colourless first?
- A0.58 : 1
- B0.67 : 1
- C1.50 : 1
- D1.71 : 1