Question 3

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waecmaths question: 

The volume of a cube is 512cm3.Find the length of its side

Option A: 

6cm

Option B: 

7cm

Option C: 

8cm

Option D: 

9cm

waecmaths solution: 

$\begin{align}  & \text{Volume of a cube }={{l}^{3}} \\ & {{l}^{3}}=512c{{m}^{3}} \\ & l=\sqrt{512c{{m}^{3}}}=8cm \\\end{align}$

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