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the angle of elevation of the top of a chimney from the top of a tower is 60 degree and the angle of depression of the foot of the chimney from the top of the tower is 30 degree. if the height of the tower is 40m find the height of the chimney. according pollution central norms the minimum height of a Smoke emitting chimney should be 100 m state of the height of the above mentioned chimney meets the pollution norms. What value is discussed in the question |
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Answer» Given : the angle of elevation of the top of a chimney from the top of a tower is 60 DEGREE and the angle of depression of the foot of the chimney from the top of the tower is 30 degree. if the height of the tower is 40m To find : height of the chimney Solution : Tower height = 40 m Let say chimney Height = H m Chimney height above tower = H - 40 m Horizontal DISTANCE between tower & chimney = D m angle of elevation of the top of a chimney from the top of a tower is 60° => TAN 60 = (H - 40)/ D => √3 = (H - 40)/ D => D√3 = H - 40 angle of depression of the foot of the chimney from the top of the tower is 30° => Tan 30 = 40/D => 1/√3 = 40/D => D = 40√3 => D√3 = 120 H - 40 = 120 => H = 160 Chimney height = 160 m 120 m above tower height Meetings the pollution Norms Hence obeying the law & environment friendly LEARN More: The angle of elevation of top of a pole from two points A and B on ... the angle of elevation of a vertical Tower observed from the age of a ... |
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