Edexcel A-Level Biology Geometry Skills

Practise Edexcel A-Level Biology geometry skills through surface area, volume, cross-sectional area, radius-diameter conversion and SA:V ratios.

Exam points

calculate surface area or volume from radius, diameter and biological measurements
convert between radius, diameter and units before using circle or sphere formulae
work out surface-area-to-volume ratios for cells, organisms or model shapes

Covered syllabus points

A.4.1—Circumference, area and volume

[Maximum number: 2]

Nematodes are a type of worm that live in a wide range of environments.

The photograph shows a nematode.

Figure for Question A.4 Geometry and trigonometry question 1 — Edexcel A-Level Biology A2

In 1986, there was a nuclear power plant disaster resulting in high levels of radiation in the surrounding area.

Scientists have been studying nematodes in the area affected by radiation (the exclusion zone).

The exclusion zone is an area with a radius of 18.6 miles from the nuclear power plant.

Calculate the area of the exclusion zone in $\mathrm{km}^{2}$ .
1 mile $=1.6 \mathrm{~km}$ .
Give your answer to a suitable number of decimal places.

Answer $\mathrm{km}^{2}$

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Covered syllabus points

A.4 Geometry and trigonometry question 1