# Conversions of Units of Length

**Conversions of customary units of length:**

1 foot = 12 inches

1 yard = 36 inches = 3 feet

1 mile = 5280 feet = 1760 yards

**Conversions of metric units of length:**

1 km = 1000 m

1 m = 100 cm

1 cm = 10 mm

**Note:**

To convert a larger unit of length to a smaller unit of length, multiply.

To convert a smaller unit of length to a larger unit of length, divide.

**For example: **Let's convert 6 yards to feet.

In order to convert a larger unit (yard) to a smaller unit (feet), we multiply.

Now, we know:

1 yard = 3 feet

Using this, we have:

6 yards = 6 × 1 yard

= 6 × 3 feet

= 18 feet

So, 6 yards = 18 feet.

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### Help

The correct answer is

##### Remember :

The smallest number is the one that comes first while counting.

##### Solution :

To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.

21,27,23

21 is the smallest number.