A plant cell is observed through a microscope at a magnification of $\times 500$. The cell image measures $20\,\text{mm}$ in width. What is the cell's actual width?
- A$0.04\,\text{mm}$
- B$0.2\,\text{mm}$
- C$4\,\text{mm}$
- D$25\,\text{mm}$
Biology 0610 · IGCSE · Size of specimens