Chapter 6.6, Problem 4PPS

To determine

To find: the scale.

Answer to Problem 4PPS

  $1\text{in}=4\text{ ft}$ .

Explanation of Solution

Given information:

A model airplane is built with a wing span of 23 inches. The actual wing span is 92 feet.

  

Calculation:

Wing span of model airplane is 23 in.

Actual wing span is 92ft.

Let the scale measure is $1\text{in}=x\text{ft}$ .

Take the proportion and solve.

  $\frac{23\text{in}}{92\text{ft}}=\frac{1\text{in}}{x\text{ft}}.$

Take the cross multiplication.

  $\begin{array}{c}23x=92\\ x=\frac{92}{23}\\ x=4\end{array}$

Hence, the scale is $1\text{in}=4\text{ ft}$ .