Question

A 4 in. by 5 in. photo is enlarged so that its width (shorter dimension) is 5 in.

What is the length of the enlarged photo?


5.25 in.


7 in.


6.25 in.


6 in.

Answer 1

Answer: 6.25 inches (choice C)

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Step-by-step explanation:

The jump from 4 inches to 5 inches is 5/4 = 1.25

In other words, 4*1.25 = 5

So we need to multiply every dimension by the scale factor 1.25 to enlarge the image. The 5 inch dimension then goes to 5*1.25 = 6.25 inches

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Here's another way you can solve

(old width)/(old length) = (new width)/(new length)

4/5 = 5/x

4x = 5*5

4x = 25

x = 25/4

x = 6.25