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What is the working for the question ​

What is the working for the question ​-example-1

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Explanation:

The cube has SIX sides ....each has area x * x

total area = 6 * x*x = 216 cm^2

6x^2 = 216

x^2 = 36

x = 6 cm

Volume = x * x * x = 216 cm^3