Question

tracy measured a boarding school and made a scale drawing. the scale she used was
1 millimeter : 9 meters. in the drawing, a building at the school is 7 millimeters wide. what is
the width of the actual building?
meters

Explanation:

Step1: Set up proportion

Let \(x\) be the width of the actual building. The proportion is \(\frac{1}{9}=\frac{7}{x}\) (since the scale is \(1\) millimeter : \(9\) meters).

Step2: Cross - multiply

Cross - multiplying gives \(1\times x = 9\times7\).

Step3: Solve for \(x\)

\(x = 63\).

Answer:

\(63\)