Simplify 3√3+10√3

Question : Simplify  3√3+10√3

1. $13 \sqrt{3}$
2. $10 \sqrt{3}$
3. $12 \sqrt{3}$
4. $11 \sqrt{3}$

Solution:
Correct option is 1. $13 \sqrt{3}$
$3 \sqrt{3}+10 \sqrt{3}=13 \sqrt{3}$