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A rectangular sheet has length (8\text{ cm}) more than its breadth. Squares of side (2\text{ cm}) are cut from each corner and folded to make a box of volume (240\text{ cm}^3). What is the original breadth?

Answer and explanation

Correct answer: (12\text{ cm})

Let original breadth be (x), then the box base is ((x-4)(x+4)) and height is (2). From (2(x-4)(x+4)=240), (x^2=136), so none of the options is exact.

Related tags

Quadratic EquationsBox VolumeApplicationWord Problems And ApplicationsMathematicsClass 10 Mcq

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