What is the length of the Australian coastline?
A) 33,216 km
B) 34,218 km
C) 34,658 km
D) 34,711 km

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Detailed Solution

The correct answer is B) 34,218 km.

Measuring the Coastline

The length of a coastline can famously vary depending on the scale of measurement. This is known as the coastline paradox—the more detailed you measure (including every small bay and inlet), the longer the coastline becomes.

While different sources provide slightly different figures, the measurement of 34,218 km is a widely cited and accepted figure for the length of the Australian mainland coastline.

For context, the official figure from Geoscience Australia, which is a more detailed measurement that includes all islands, puts the total coastline length at nearly 60,000 km. However, for the purpose of a standard measurement of the mainland, 34,218 km is the correct choice among the options provided.

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