Question

I don’t know why I got 12 wrong please help me

Answer 1

12.

Given that the length of the ladder is 12 feet and the ladder is placed 4 feet away from the base of the ladder.

We have to find how high the ladder reaches the wall.

From the figure, by Pythagoras theorem, we can say that:

`\begin{gathered} x^2+4^2=12^2^{} \\ x^2+16=144 \\ x^2=144-16 \\ x^2=128 \\ x=\sqrt[]{128} \\ x=11.31 \end{gathered}`

Thus, the ladder goes 11.31 feet high on the wall.