Q. 55.0( 1 Vote )

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

Answer :

Volume of the cube = 64 cm3
...       a3 = 64 
⇒    a = 4 cm
...     Length of resulting cuboid = 4 + 4 = 8 cm.
breadth = 4 cm and height = 4 cm.
Total surface area of the cuboid = 2(lb + bh + hl)                                   
                                  = 2(8 x 4 + 4 x 4 + 4 x 8)
                                     = 160 cm2

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