How many centimeters in an inch on a 12-inch ruler?

A centimeter is a unit of the metric system that is used to measure length.

Answer: There are 30 centimeters displayed on a 12-inch ruler.

We will use the inches and centimeter-scale to determine the required answer.

Explanation:

1 inch is approximately equal to 2.54 centimeters.

By the unitary method, 12 inches = 30.48 centimeters, but it shows only 30 cm on the ruler.

So, in a 12 inches ruler, there are 30 centimeters.