A Concrete Product Is Being Designed $×$ 64 In
B) 77 In Being

question 198

Multiple Choice

A concrete product is being designed. It is a cube 2 ft on a side. To reduce the weight of the final product, it will be "voided" using a cardboard box. 2 in. of concrete must be maintained and there is no concrete on the bottom -- see the illustration below.   What size sheet of cardboard can this shape be cut from?

• A) 77 in. \( ×\) 64 in.
• B) 77 in. \( ×\) 63 in.
• C) 81 in. \( ×\) 64 in.
• D) 81 in. \( ×\) 81 in.
• E) 81 in. \( ×\) 63 in.

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