<PRE><B>Question 1064722</B>
let x be the length of 1 side of our cube, then
:
2x is the length of a side of the new cube and
:
2x * 2x * 2x = 64000
:
8 * x^3 = 64000
:
x^ 3 = 8000
:
x = cube root(8000) = 20
:
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the area of one face of the original cube is 
20 * 20 = 400 cm^2
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:
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