8. Find the volume of a cube whose surface area is
216 m². Is the numerical value of the surface area
same as that of its volume?
9. Prove that if a number is doubled then its cube
is 8 times the cube of the given number.
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8. Volume = 216m², Yes it's same
9. Let b = 2a
a³ = a*a*a= a³
b = 2a*2a*2a= 8a³ = 8 × a³
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