A-Level Edexcel Biology Circumference, Area and Volume

Review A-Level Edexcel Biology circumference, area and volume through pupil, cell, hydra and chloroplast calculations with unit conversions.

Exam points

calculate cell or pupil areas using radius, diameter and pi-based formulae
work out surface-area-to-volume ratios for cubes, hydra or cell shapes
convert units and report sphere or cell volumes in standard form where required

[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.4.1—Circumference, area and volume 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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A.4.1—Circumference, area and volume question 1