Question

is √3/81 is an irrational
ans should be wid explaination

Answer 1

yes
$\sqrt{3} \div 81$

is an irrational number

Answer 2

$\sqrt{ \frac{3}{81} } \: is \: an \: irrational \: number$
As For simple understanding,
Number with root or fraction are irrational numbers.
Ex:- √5, 7/9
For information π is also an irrational number.
___________________
Hope it helped you dear.