Q27 of 94 Page 222

The volume of a cube is 729 cm3. Find its surface area.

Let us assume the edge of the cube be a

We know that,


Volume of the cube = a3


a3 = 729 cm3


a =


a = 9 cm


We also know that,


Total surface area of cube = 6a2


= 6 × 9 × 9


= 486 cm2


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