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Three equal cubes are placed adjacently in a row. Find the ratio of total surface area of the new cuboid to that of the sum

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Three equal cubes are placed adjacently in a row. Find the ratio of total surface area of the new cuboid to that of the sum of the surface areas of the three cubes.

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Length of new cuboid = 3a 

Breadth of cuboid = a 

Height of new cuboid = a 

The total surface area of new cuboid

 

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