Answer:
OPTION C: 105 ft.
Explanation:
Note that the width of the building in the map is 3 ft.
The width of the actual building is 45 ft.
That means, the actual building is 15 times more than the map, since,
.
Therefore, the height of the actual building would be 7 X 15 = 105 ft.
Hence, the height of the actual building is 105 ft. which is OPTION C.