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A hoarding is sitted above a building. T...

A hoarding is sitted above a building. The height of the building is 12 m. When I look at the light sitted on top of the hoarding from a nearby busstop, the angle of elevation is `50^@` and when I look at the top of the building (terrace) from the same bus stop, the angle of elevation is `45^@`. If the height of a flat on each floor is equal to the height of the hoarding, the maximum number of floors in the building are: (a) 2 (b) 5 (c) 4 (d) 7

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