Chapter 0, Problem 29PR

To determine

To evaluate: the width of the enlarged image.

Answer to Problem 29PR

The width of the enlarged image is 7.2 inches.

Explanation of Solution

Given information :

It is given that a photo that is 3 inches wide by 5 inches long is being enlarged so that it is 12 inches long.

Let the width of the enlarged image be ‘ x’ .

It is understood that enlarged image and actual image are similar,

So, the ratio of their sides is equal,

  $\begin{array}{c}\frac{3}{5}=\frac{x}{12}\\ x=\frac{12\times 3}{5}\\ =7.2\text{inches}\end{array}$

So, the height of the actual painting is 7.2 inches.