The angle of elevation of the top of the building from the foot of the tower is 30 and the angle of the top of the tower from the foot of the building is 60. If the tower is 50/3 m high, find the height of the building.
Question
The angle of elevation of the top of the building from the foot of the tower is 30 and the angle of the top of the tower from the foot of the building is 60. If the tower is 50/3 m high, find the height of the building.
Solution
To solve this problem, we can use the trigonometric ratios, specifically the tangent of an angle in a right triangle.
Step 1: Let's denote the height of the building as h and the distance between the tower and the building as d.
Step 2: From the given, we know that the angle of elevation of the top of the building from the foot of the tower is 30 degrees. This means that tan(30) = h/d.
Step 3: We also know that the angle of elevation of the top of the tower from the foot of the building is 60 degrees. This means that tan(60) = (h + 50/3) / d.
Step 4: We know that tan(30) = 1/√3 and tan(60) = √3. Substituting these values into the equations from step 2 and 3, we get:
1/√3 = h/d and √3 = (h + 50/3) / d.
Step 5: From the first equation, we can express d as d = √3 * h.
Step 6: Substituting d from step 5 into the second equation, we get √3 = (h + 50/3) / (√3 * h).
Step 7: Simplifying this equation, we get h^2 + 50√3/3 = h.
Step 8: Solving this quadratic equation, we get h = 25/√3 m.
So, the height of the building is 25/√3 m.
Similar Questions
The angle of elevation of the top of a tower at a point X is 30°. On walking 30 m towards the tower if the angle of elevation becomes 60° at point Y, find the height of the tower?
The angle of elevation of the top of a building 30 m high from a point in the same plane is 60º, then the distance of the point from the foot of the building is
From a point P on a level ground, the angle of elevation of the top tower is 30deg. If the tower is 100 m high, the distance of point P from the foot of the tower is
Angle of elevation measured for a tower erected over a building from a point of aninstrument located on the ground was 12° and 9° for the top and bottom of the towerrespectively. The height of the tower is 9 m. If the angle at depression of plinth level ofthe building from the same instrument is 4°, calculate the height of the building. (7Marks)
From a point 375 meters away from the foot of a tower, the top of the tower is observed at an angle of elevation of 45deg, then the height (in meters) of the tower is?
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.