Question

could you help with

Answer 1

First, we draw a picture

we must use pythagoras

$a^2+b^2=h^2$

where a and b are the sides of the triangle and h the hypotenuse

so, on this case the h is 20 because is the hypotenuse and 4 can be a or b, and the black line is the other side

then, replacing

$\begin{gathered} 4^2+b^2=20^2 \\ b^2=20^2-4^2 \\ b=\sqrt[]{20^2-4^2} \\ \\ b=8\sqrt[]{6}\approx19.5959 \end{gathered}$

the distance is 19.5959 feet, so the right option is second