3) How tall is the building?
You stand NEXT TO a building. Your height is $5 \mathrm{ft}$, and your shadow is $8 \mathrm{ft}$. The building has a shadow of 28 feet. How tall is the building? Draw a picture and write and solve a proportion to answer the question.

Answer

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Answer

Final Answer: The height of the building is $\boxed{17.5}$ feet.

Steps

Step 1 ：Draw a picture and notice that the person and the building form similar triangles with their shadows.

Step 2 ：Set up a proportion using the person's height and shadow length and the building's height and shadow length: $\frac{5}{8} = \frac{x}{28}$

Step 3 ：Solve for x: $x = \frac{5}{8} \times 28$

Step 4 ：Calculate the value of x: $x = 17.5$

Step 5 ：Final Answer: The height of the building is $\boxed{17.5}$ feet.