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Find the side of a cube whose volume is $\frac{729}{343} cm^3$
Given :
The volume of the cube is $\frac{729}{343} cm^3$
To do :
We have to find the side of the cube.
Solution :
The volume of a cube of side 'a' $=a^3$
So, $a^3 = \frac{729}{343} cm^3$
$a = \sqrt[3]{\frac{729}{343} cm^3}$
$a = \sqrt[3]{\frac{9 \times 9 \times 9}{7 \times 7 \times 7} cm^3}$
$a = \sqrt[3]{\frac{9^3}{7^3} cm^3}$
We know that, $\sqrt[3]{x^3} = x$
Therefore, $a = \frac{9}{7} cm$.
Side of the cube is $ \frac{9}{7} cm$.
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