Question 1

What is a cho in Japanese measurement?

Accepted Answer

A cho (町) is a Japanese unit equal to about 109.09 meters. Used for measuring distances and rice paddy areas in traditional Japan.

Question 2

How many cho make a ri?

Accepted Answer

36 cho = 1 ri (about 3.93 km). The cho was used in daily life while ri was used for longer travel distances.

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.

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