Bunuel wrote:

A length of wire is attached to the top of a 16-foot vertical pole. The wire is anchored 12 feet from the base of the pole. What is the length, in feet, of the wire?

(A) 14

(B) 18

(C) 20

(D) 28

(E) 30

When we visualize the pole and the wire, you will get the following figure

Attachment:

Pole_Wire.png [ 3.5 KiB | Viewed 282 times ]
A right-angled triangle is formed where the length of the wire is

the hypotenuse of the right-angled triangle.

This can be calculated as follows

\(Length^2 = 12^2 + 16^2 = 144 + 256 = 400\)

Therefore, the length of the wire is \(\sqrt{400} = 20\)

(Option C)
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