Question 1

What is a chain in surveying?

Accepted Answer

A Gunter chain is 66 feet (20.12 m) or 100 links. 10 chains = 1 furlong, 80 chains = 1 mile. Still used in US land surveying.

Question 2

Why are chains used in land measurement?

Accepted Answer

Chains make acre calculation easy: 1 acre = 10 square chains = 1 chain × 1 furlong. An acre is 4,840 square yards.

Question 3

Is this conversion factor exact?

Accepted Answer

Metric-to-metric conversions are exact (1 km = 1000 m). Imperial-to-metric factors like 1 inch = 2.54 cm are exact by international agreement.

Question 4

Why do some countries use different units?

Accepted Answer

Historical reasons - the metric system spread from France after 1795. The US, UK, and a few others retained older systems. Science uses metric worldwide.

ch to ft Converter

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