A stick 2 m long is placed vertically at point B. The top of the stick is in line with the top of a tree as seen from point A, w
hich is 3 m from the stick and 30 m from the tree. How tall is the tree?
1 answer:
Answer: 20 meters.
Step-by-step explanation:
1. Keeping on mind the information shown in the figure attached and the similarity of both triangles, you can calculate the height of the tree (h) as you can see below:
2. Now, you must solve for the height. So, you obtain the following result:
3. Therefore, the height of the tree is 20 meters.
You might be interested in
Answer:
y = 4 sin( 0.5t - ) - 2
y = a sin ( 2t - ) + 2
Step-by-step explanation:
In the first question,
amplitude = 4
Period =
phase shift =
Vertical shift = -2
Angular velocity , w =
Here, w = = 0.5
The general equation of a wave is
y = a sin( wt + ∅ )
Putting above values in the equation,
y = 4 sin( 0.5t - ) - 2
In the second question,
Amplitude is not given so we will take it as a.
time period =
w = 2
Phase shift =
Vertical shift = 2
The equation is
y = a sin ( 2t - ) + 2