An open box is made by cutting the co...

An open box is made by cutting the congruent squares from the corners of a rectangular sheet of cardboard of dimensions `20 c mxx15 c m` . If the side of each square is 2 cm, the total outer surface area of the box is (a) 148 cm2 (b) 284 cm2 (c) 316 cm2 (d) 460 cm2

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