Is √(20.25) rational or irrational?

Question

Is
`√(20.25)` rational or irrational?

Answer 1

Rational

Explanation:

Here, we want to check if the given value is rational or irrational

If a certain number is a non -perfect square, and it is placed inside the root, then it is a surd and thus termed irrational

However, the number 20.25 is a perfect square. in fact the square root is 4.5

This mean the expression is not irrational