The square root of 400 is 20.8. It can be found by taking the square root of 400 and then dividing it by 100.

### Introduction: What is the square root of 400?

### Mathematical Properties of the Square Root: The square root is a number that has a unique mathematical property: it is the inverse of pi.

### Finding the Square Root of 400: There are many ways to find the square root of 400, but one easy way is to use a calculator.

There are many ways to find the square root of 400. One easy way is to use a calculator. To do this, divide 400 by 4 to get 100. Then, take the square root of 100 which is 32. Therefore, the square root of 400 is 32.

### Other Uses for the Square Root of 400: The square root can also be used in calculus and physics.

The square root of 400 can be used in calculus and physics. It is also important in mathematics and engineering. The square root of 400 can be used to find the dimensions of a rectangle or the surface area of a sphere.