Question

√225 is
(a) a rational number
(b) an irrational number
(c) a real number
(d) both (a) & (c)

Answer 1

$\sqrt{225} = \sqrt{15 * 15} = 15$

So it is a real number, it is an integer, it is a rational number

answer will be d  both a and c

Answer 2

Answer:

The answer is (d) both real and rational number

Solution:  

Rational number must be the one which we can able to write in terms of fraction while the irrational numbers don’t.

Given,

$\begin{array} { c } { \sqrt { 225 } } \\\\ { \sqrt { 225 } = \sqrt { 15 \times 15 } = \sqrt { 15 } } \end{array}$

$\sqrt{225}$ will give 15 as the result.  

Now 15 is a "rational number" and a real number as well.  

So the correct option must be (d) since it is both a rational and a real number