Answer:
The actual height of the observation deck is 1206.82 ft
Explanation:
Let h be the height of the building
And d be the height of the observation deck
Therefore,
d/h = 8.3/10 = 0.83
d = 0.83h
Given that h = 1454 ft
d = 0.83 × 1454 ft
d = 1206.82 ft