Question
The volume of a cube is $729 cm^3$. Find its surface area.

Answer

Volume of a cube $=729 cm^3$
Let edge of cube $=(9)^3$
$a=9 cm .$
Hence surface $=6 a ^2=6(9)^2 cm^2$
$=6 \times 81$
$=486 cm^2$

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