Answer:
Let the side of the cube be a cm. Then, Total surface area of the cube \[=6{{a}^{2}}\] According to the question, \[6{{a}^{2}}=600\] \[\Rightarrow \] \[{{a}^{2}}=\frac{600}{6}\] \[\Rightarrow \] \[{{a}^{2}}=100\] \[\Rightarrow \] \[a=\sqrt{100}\] \[\Rightarrow \] \[a=10\,cm\] Hence, the side of the cube is 10 cm.
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