Part 3 of 3

Magnification

calculate

Try it yourself

calculate: work out the answer from the data.

A drawing of a cell is 60 mm long. The drawing is magnified ×300. Calculate the actual length of the cell in millimetres.

Give your answer with its unit

Type numbers like 0.25 or 2.5x10^-3. Put the unit in its own box, for example g, cm3 or m/s. Leave the unit box empty if the quantity has no unit.

Actual length

Number

Unit

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Scope and sources

Cambridge IGCSE Biology 0610 · 2026–2028 v3 · Original learning materials.

The structure and functions of plant, animal and bacterial cells (2.1.1–2.1.4) through a microscope practical: preparing an onion-skin slide, focusing from low to high power, and comparing cheek cells and a pondweed leaf. Part 2 covers cell division, specialised cells and levels of organisation (2.1.5–2.1.7); part 3 magnification and units (2.2.1–2.2.3).

Apparatus, amounts and times in the experiment are illustrative. Real practical work follows a teacher-approved safety method.

Official Cambridge syllabus