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Mathematics 21 Online
OpenStudy (anonymous):

Two cubes have edges with a scale factor of 2 : 3. What is the ratio of their total areas? 1.2 : 3 2.4 : 9 3.4 : 6 4.8 : 27

jimthompson5910 (jim_thompson5910):

The ratio of their surface areas is equal to the squares of the individual parts of the original ratio So the answer is choice 2) 4:9

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