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A 4x5 inch photo is enlarged by multiplying every dimension by 2 to form a similar 8x10 inch photo. What is the ratio of the perimeter of the smaller rectangle to that of the larger?

Answer :

trombonebookworm
The first photo has a perimeter of 18
The second photo has a perimeter of 36

So, the ratio is 18:36 which simplifies to 1:2

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