Find the value of ​$$\sqrt{{125} + \sqrt{{344} + \sqrt{289}}}$$​.

Correct option is B

Given: ​

​$$\sqrt{{125} + \sqrt{{344} + \sqrt{289}}}$$ 

Solution: ​

​$$\sqrt{{125} + \sqrt{{344} + \sqrt{289}}} \\ \ \\ = \sqrt{{125} + \sqrt{{344} + 17}} \\ \ \\ = \sqrt{{125} + 19}\\ \ \\ = 12$$​​