Calculate the lengths of the cube with a total surface area of
Odinaka_OTyro
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Total surface area of cube=
, where l=length
![Rendered by QuickLaTeX.com \Rightarrow 864=6\times l^{2}](https://acedstudy.com/wp-content/ql-cache/quicklatex.com-02fe50afa9ec8209d0ed7ee7de3a238d_l3.png)
![Rendered by QuickLaTeX.com \Rightarrow l^{2}=144](https://acedstudy.com/wp-content/ql-cache/quicklatex.com-2537b8e68e7b24e5b6e7a47d6a0417b3_l3.png)
![Rendered by QuickLaTeX.com \therefore l=\sqrt{144}=12cm](https://acedstudy.com/wp-content/ql-cache/quicklatex.com-a2e3eb74a596a7a88091ddde4ab45d27_l3.png)
divide both sides by 6
square root both sides