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Mathematics 9 Online
OpenStudy (anonymous):

A rectangular picture has dimensions 2½ by 1½. It is to be enlarged so that it is still similar to the original rectangle. If the longer dimension is now 10, how much longer than the original is the perimeter now? 2.5 times 3 times 3.5 times 4 times

OpenStudy (xguardians):

10 (After stretch long side) / 2.5 (Original Long Side) = 4. 4 Times Larger.

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