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Question:

A tree breaks due to storm and the broken part bends, so that the top of the tree touches the ground making an angle 30° with it. The distance between the foot of the tree to the point where the top touches the ground is 8m. Find the height of the tree.

Solution:

Let the height of the tree be h meters.
Let the length of the broken part of the tree be x meters.
The broken part of the tree makes an angle of 30° with the ground.
The distance between the foot of the tree and the point where the top touches the ground is 8m.
From the right-angled triangle formed, we have:
cos(30°) = 8/x
x = 8/cos(30°)
x = 8/(√3/2)
x = 16/√3
Also, we have:
sin(30°) = (h-y)/x
where y is the height of the unbroken part of the tree.
1/2 = (h-y)/(16/√3)
h - y = 8/√3
In the right-angled triangle, we have:
x² = y² + 8²
(16/√3)² = y² + 64
256/3 = y² + 64
y² = 256/3 - 192/3
y² = 64/3
y = 8/√3
Then the height of the tree is:
h = y + 8/√3
h = 8/√3 + 8/√3
h = 16/√3
h = 16√3/3
h ≈ 9.24 meters
Therefore, the height of the tree is approximately 9.24 meters.