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Question

A rectangular piece of cardboard is 40 in. wide and 50 in. long. Squares 5 in. on a side are cut out of each corner, and the remaining flaps are bent up to form an open box. The number of cubic inches in the box is

A
1,200
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B
7,875
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C
6,000
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D
8,000
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E
10,000
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Solution

The correct option is C 6,000
The new length of of rectangular piece is 5055=40
The new width of rectangular piece is 4055=30
The height of rectangular piece after bent is 5
Therefore, the volume is 40×30×5=6,000.

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