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With measurements in feet and inches calculations have to be made in ordinary or decimal fractions.

3'5" = 35/12 = 41/12 : 19' 6" = 196/12 which simplifies to 191/2 = 39/2.

41/12 x 39/2 = 1599/24 = 6615/24 which simplifies to 665/8 sq ft

OR 3.41667 x 19.5 = 66.625 sq ft

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15y ago

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