The correct option is B √5 m
ABC is a right - angled isosceles triangle.
The sides are in the ratio 1 : 1 : √2
Let the sides be x, x , √2 x
Here, x = √2
∴ The Length of AC = √2x
= √2×√2 = 2 m
Hence, using Pythagoras theorem we can say:
AD = √12+22 = √5 m