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Two cubes each with side b are joined to...

Two cubes each with side b are joined to form a cuboid. What is the surface area of this cuboid? Is it `12b^2`? Is the surface area of cuboid formed by joining three such cubes, `18b^2`? Why?

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ASHOK PUBLICATION ASSAM-Mensuration-EXAMPLE
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  7. Can we say that the total surface area of cuboid = lateral surface are...

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  8. If we interchange the lenths of the base and the height of a cuboid to...

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  9. If we interchange the lenths of the base and the height of a cuboid to...

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