Answer:
[tex]\sqrt{203}m[/tex]
Step-by-step explanation:
The given triangle is a right triangle.
According to the Pythagoras Theorem; The length of the square of the hypotenuse is equal to the sum of the squares of the two shorter legs.
Let the unknown shorter side be [tex]l[/tex] meters, then
[tex]11^2+l^2=18^2[/tex]
This implies that;
[tex]121+l^2=324[/tex]
[tex]\Rightarrow l^2=324-121[/tex]
[tex]\Rightarrow l^2=203[/tex]
Take positive square root of both sides;
[tex]l=\sqrt{203}[/tex]
The correct choice is D
