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It is 22 in by 27 in.

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How it is solved:

The rectangle is 5 in longer than its width, so the dimensions can be given in terms of its width:

Its dimensions are width by (width+5)

In removing 1 inch squares from the corners, he flaps are going to be (width-2) and (width+5-2) = (width-3) long.

Thus the box formed will have volume:

volume = (width - 2) in × (width + 3) in × 1 in

→ volume = width² + width - 6 in³

But we are told this is 500 in³; thus:

width² + width - 6 in³ = 500 in³

→ width ² + width - 506 = 0

→ (width + 23)(width - 22) = 0

→ width = -23 or 22

As a length cannot be negative, the width must be 22 in

which means the original rectangle is 22 in by 22+5 in = 27 in

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