Radio towers, designed to support broadcasting and telecommunications, are
among the tallest non-natural structures.
Construction and maintenance of radio
towers is rated as one of the most
dangerous jobs in the world. To change
the antenna of one of these towers, a crew
sets up a system of pulleys. The diagram
models the machinery and cable set-up.
Suppose the height of the antenna is 30 m.
Determine the total height of the structure.