Question
upstudy study bank question image url

An elm tree casts a shadow that is 15 feet long. A wooden column near the elm tree casts a shadow that is 30 feet long. If the elm tree is 8 feet tall, how tall is the wooden column? Write your answer as a whole number or a decimal. Do not round.

Ask by Logan Hardy. in the United States
Jan 23,2025

Real Tutor Solution

Tutor-Verified Answer

Answer

The wooden column is 16 feet tall.

Solution

To find the height of the wooden column, we can use the concept of similar triangles. The trees and their shadows form similar triangles because the angles of elevation of the sun are the same for both. **Given:** - Height of the elm tree = 8 feet - Shadow of the elm tree = 15 feet - Shadow of the wooden column = 30 feet **Let:** - Height of the wooden column = \( x \) feet **Set up the proportion based on similar triangles:** \[ \frac{\text{Height of Elm Tree}}{\text{Shadow of Elm Tree}} = \frac{\text{Height of Wooden Column}}{\text{Shadow of Wooden Column}} \] \[ \frac{8}{15} = \frac{x}{30} \] **Solve for \( x \):** \[ x = \frac{8}{15} \times 30 \] \[ x = 16 \] **Answer:** 16

Reviewed and approved by the UpStudy tutoring team

error msg
Explain
Simplify this solution

Beyond the Answer

To find the height of the wooden column, we can set up a proportion based on the lengths of the shadows and the heights of the objects. The ratio of the height of the elm tree to the length of its shadow is the same as the ratio of the height of the wooden column to the length of its shadow: \[ \frac{\text{Height of elm tree}}{\text{Shadow of elm tree}} = \frac{\text{Height of wooden column}}{\text{Shadow of wooden column}} \] Plugging in the values we know: \[ \frac{8 \text{ ft}}{15 \text{ ft}} = \frac{h}{30 \text{ ft}} \] To solve for \( h \) (the height of the wooden column), we can cross-multiply: \[ 8 \times 30 = 15 \times h \] This simplifies to: \[ 240 = 15h \] Now divide both sides by 15 to find \( h \): \[ h = \frac{240}{15} = 16 \] Thus, the wooden column is **16 feet tall**.

Related Questions

Try Premium now!
Try Premium and ask Thoth AI unlimited math questions now!
Maybe later Go Premium
Study can be a real struggle
Why not UpStudy it?
Select your plan below
Premium

You can enjoy

Start now
  • Step-by-step explanations
  • 24/7 expert live tutors
  • Unlimited number of questions
  • No interruptions
  • Full access to Answer and Solution
  • Full Access to PDF Chat, UpStudy Chat, Browsing Chat
Basic

Totally free but limited

  • Limited Solution
Welcome to UpStudy!
Please sign in to continue the Thoth AI Chat journey
Continue with Email
Or continue with
By clicking “Sign in”, you agree to our Terms of Use & Privacy Policy