Answer:
408.6 meters.
Step-by-step explanation:
Let x be the height from the base of the building to the 86th floor,
∵ the total height of the building is another 124 meters above the 86th floor,
So, the total height of the building = ( x + 124 ) meters,
Now, the angle of elevation from the point on the ground to 86th floor = 82°,
Also, the distance from the point to the base of the building = 41 meters,
Thus, by trigonometric ratio,
Hence, the height of the building = ( 284.6 + 124 ) = 408.6 meters.