To convert 20 cm to inches, we will use the conversion factor of 1 cm = 0.3937 inches.
Step 1: Write down the given value.
In this case, it is 20 cm.
Step 2: Write down the conversion factor.
As mentioned earlier, the conversion factor is 1 cm = 0.3937 inches.
Step 3: Set up the conversion equation.
The general formula for conversion is:
desired unit = given value x conversion factor
Step 4: Substitute the given value in the equation.
desired unit (inches) = 20 cm x conversion factor
Step 5: Multiply the given value by the conversion factor.
desired unit (inches) = 20 cm x 0.3937 inches
Step 6: Simplify the equation.
desired unit (inches) = 7.874 inches
Step 7: Round off the decimal value to the nearest hundredth.
Since inches is a unit of measurement that allows two decimal places, the final answer should also have two decimal places.
So, the converted value is 7.87 inches (rounded off to two decimal places).
Therefore, 20 cm is equivalent to 7.87 inches.