Three cubes have edge lengths 3 \mathrm{~cm}, 12 \mathrm{~cm}, and x \mathrm{~cm}. The average volume of the three cubes is 700 \mathrm{~cm}^{3}. The value of x, rounded to the nearest integer, is
Answer Choices
A. 6
B. 10
C. 8
D. 9
E. 7
Three cubes have edge lengths 3 \mathrm{~cm}, 12 \mathrm{~cm}, and x \mathrm{~cm}. The average volume of the three cubes is 700 \mathrm{~cm}^{3}. The value of x, rounded to the nearest integer, is
Answer Choices
A. 6
B. 10
C. 8
D. 9
E. 7