.a rectangular piece of card has a square of side 2 cm removed from each corner . if the surface area of this open box is 140 cm square , find the dimensions of the box?

Dear Student,

Please find below the solution to the asked query :

Let l, b and h be the length, breadth and height of the open box.Now, h = 2 cmNow, surface area of open box = 140 cm22l+bh = 140l + b = 1404l + b = 35

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