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A person standing on the ground observes the top of a pole at an angle of elevat

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Question: A person standing on the ground observes the top of a pole at an angle of elevation of 75 degrees. If the pole is 10 m high, how far is the person from the base of the pole? (2023)

Options:

  1. 2.68 m
  2. 5.77 m
  3. 10 m
  4. 15 m

Correct Answer: 5.77 m

Exam Year: 2023

Solution: 

Distance = height / tan(75) = 10 / 3.732 ≈ 2.68 m.

A person standing on the ground observes the top of a pole at an angle of elevat

Practice Questions

Q1
A person standing on the ground observes the top of a pole at an angle of elevation of 75 degrees. If the pole is 10 m high, how far is the person from the base of the pole? (2023)
  1. 2.68 m
  2. 5.77 m
  3. 10 m
  4. 15 m

Questions & Step-by-Step Solutions

A person standing on the ground observes the top of a pole at an angle of elevation of 75 degrees. If the pole is 10 m high, how far is the person from the base of the pole? (2023)
  • Step 1: Understand the problem. We have a pole that is 10 meters high and we want to find out how far a person is from the base of the pole.
  • Step 2: Identify the angle of elevation. The person sees the top of the pole at an angle of 75 degrees.
  • Step 3: Use the tangent function. In a right triangle, the tangent of an angle is equal to the opposite side (height of the pole) divided by the adjacent side (distance from the pole).
  • Step 4: Write the formula. We can express this as: tan(angle) = height / distance.
  • Step 5: Rearrange the formula to find distance. This gives us: distance = height / tan(angle).
  • Step 6: Plug in the values. Here, height = 10 m and angle = 75 degrees, so we calculate: distance = 10 / tan(75).
  • Step 7: Calculate tan(75 degrees). The value of tan(75 degrees) is approximately 3.732.
  • Step 8: Perform the division. Now calculate: distance = 10 / 3.732.
  • Step 9: Get the final answer. This gives us approximately 2.68 meters.
  • Trigonometry – The question tests the understanding of right triangle relationships, specifically using the tangent function to relate angles and side lengths.
  • Angle of Elevation – The concept of angle of elevation is crucial for determining the relationship between the observer's position and the height of the pole.
  • Height and Distance Calculation – The problem involves calculating the horizontal distance from the pole using the height and the angle of elevation.
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