What is 20cm in inches?
The Correct answer and Explanation is:
To convert 20 centimeters (cm) to inches, you can use the conversion factor:
1 centimeter = 0.393701 inches.
Using this conversion factor:
[
20 \, \text{cm} \times 0.393701 \, \text{inches/cm} = 7.87402 \, \text{inches}
]
So, 20 cm equals approximately 7.87 inches.
Explanation:
The relationship between centimeters and inches is based on the metric and imperial systems of measurement. The centimeter is a unit of length in the metric system, which is commonly used in most parts of the world. The inch, on the other hand, is a unit of length in the imperial system, used primarily in the United States, the United Kingdom, and a few other countries.
Conversion Factor:
The conversion factor between centimeters and inches is derived from the fact that 1 inch is exactly equal to 2.54 centimeters. To find how many inches are in a centimeter, you can take the reciprocal of 2.54, which gives approximately 0.393701 inches per centimeter.
Steps for Conversion:
To convert centimeters to inches, you multiply the number of centimeters by the conversion factor (0.393701). For example, when converting 20 cm:
- Multiply 20 cm by 0.393701 to get 7.87402 inches.
- The result, 7.87 inches, can be rounded depending on the level of precision required. In everyday situations, rounding to two decimal places (7.87 inches) is often sufficient.
Practical Use:
This conversion is helpful in various real-world applications, such as when you are measuring objects, designing, or working on tasks that involve mixing metric and imperial measurements. For example, understanding the conversion can help in international trade, construction, or even in daily activities like buying items measured in different units.