The height of the tower is .

Let be the height of the building.

Let be the distance between tower and building.

The angle of elevation from the base of an office building to the tower is .

The angle of elevation from the roof of the building to the top of the building is .

**(a)**

Consider .

.

.

The distance between the office building from the Freedom Tower is .

**(b)**

Consider .

Substitute .

.

The height of the office building is .

**(a) **The distance between the office building from the Freedom Tower is .

**(b) **The height of the office building is .

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