Question

a photograph that measures 20 cm by 15 cm is enlarged so that its length becomes 28 cm. what does the width become?

Answer 1

the width becomes 21 centimeters hope this helps:)

Answer 2

$\frac{width}{distance} = \frac{15}{20} = \frac{3}{4}$

This means that ,assumining the dimensions stay the same, the width will be equal to three quaters of the length

∴ When length=28cm 
   width = 0.75 × 28 = 21cm