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The angle of elevation of the top of cel...

The angle of elevation of the top of cell phone tower from the foot of a high apartment is `60^(@)` and the angle of depression of the foot of the tower from the top of the apartment is `30^(@)`. If the height of the apartment is `50m`, find the height of the cell tower. According to radiations control norms, the minimum height of the cell phone tower should be 120m. State if the height of the above mentioned cell phone tower meets the radiation norms.

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