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  3. If a cube has a total surface area of 96, what is its volume?

If a cube has a total surface area of 96, what is its volume?

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问题 If a cube has a total surface area of 96, what is its volume?
选项 A、16
B、36
C、64
D、81
E、96
答案C
解析 A cube has six sides, so if the total surface area is 96, then the surface area of a square side is 96/6=16. The area of a square is the square of the length of its sides, so the length of a side is . The volume of a cube is the cube of the length of its sides, so 4×4×4=64
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