Question

An open box is made from a square of cardboard of 30cms side,by cutting squares of length x centimetres from each corners and folding the sides up. Express the volume of the box as a function of x . Also find its domain.
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Answer 1

Answer:

Length of the box = 30 - 2x

Breadth of the box = 30 - 2x

Height of the box = x

volume =

$(30 - 2x)2 {?}^{2}$