To convert 20cm to inches, you can use the following steps:
1. Know the conversion factor: 1 inch is equal to 2.54 centimeters.
2. Set up the conversion equation:
20 cm * (1 inch / 2.54 cm) = x inches
3. Solve for x:
20 cm * (1 inch / 2.54 cm) = 7.87 inches
Therefore, 20 cm is equal to 7.87 inches.
Real-life example:
If you have a ruler that measures in centimeters and you want to know how many inches a 20 cm length is, you can use the conversion factor to find out that it is approximately 7.87 inches long.
FAQs:
1. Why do we need to convert units?
Converting units allows us to easily compare and work with different measurements in a standardized way.
2. Can I convert units without knowing the conversion factor?
It is recommended to know the conversion factor to accurately convert units, but there are also online converters and calculators available for convenience.
3. How can I remember the conversion factors?
You can create mnemonic devices, practice using them in calculations, or refer to conversion charts for quick reference.