Q1 of 38 Page 244

2 cubes each of volume 64 cm3 are joined end to end. Find the surface area of the resulting cuboid.

Volume of cube = 64 cm3

We know that,


Side of cube =


=


= 4 cm


Length of new cuboid = 8 cm


Height of new cuboid = 4 cm


Width of new cuboid = 4 cm


We know that:


Surface Area = 2(lb + lh + bh)


= 2(8*4 + 8*4 + 4*4)


= 2*80


= 160 cm2


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