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Mathematics, 23.10.2020 15:50 meandmycousinmagic

a page in a photograph album measures 30cm by 20cm, it contains 6 square photos each of side 6cm, what is the area of the page which is not covered by the photos

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a page in a photograph album measures 30cm by 20cm, it contains 6 square photos each of side 6cm, wh...
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