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A cube of side length \(x\) centimeters is placed on a floor. A cube of side length \(x/2\) centimeters is placed at the center of the top of the cube of side length \(x\) centimeters. What fraction of the total surface area of the cubes is visible?
A. \(\dfrac{21}{30}\)
B. \(\dfrac{2}{3}\)
C. \(\dfrac{23}{30}\)
D. \(\dfrac{4}{5}\)
E. \(\dfrac{5}{6}\)
Answer: D
Source: e-GMAT
A. \(\dfrac{21}{30}\)
B. \(\dfrac{2}{3}\)
C. \(\dfrac{23}{30}\)
D. \(\dfrac{4}{5}\)
E. \(\dfrac{5}{6}\)
Answer: D
Source: e-GMAT
