30 cm or 300 mm onstandard metric school ruler
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A normal school ruler is typically 30 centimeters in length, which is equivalent to 300 millimeters.
There are 10 millimetres in one centimetre. Therefore, 4 centimetres is equal to 4 x 10 = 40 millimetres. 4 centimeters equals 40 millimeters just look at the metric side of a ruler no its wrong
The units of length on a ruler are typically in inches and centimeters. Each inch is divided into smaller units, such as eighths or sixteenths, while centimeters are divided into smaller units called millimeters.
You can use a ruler or measuring tape to measure the length of your pencil or scissors. Measurements are typically done in inches or centimeters.
The side of a ruler that measures metric units is usually the side with centimeters and millimeters marked on it. The metric side of the ruler is typically marked with increments in centimeters and millimeters for measuring lengths in the metric system.
You can use a ruler or a measuring tape to measure the length of a fish in a bowl. Place the measuring tool along the straight body of the fish from the tip of its nose to the end of its tail to get an accurate measurement.