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The dimensions of an open box are `52 c mxx40 c mxx29 c m` . Its thickness is 2 cm. If 1 cu. cm of metal used in the box weighs 0.5 gm, then the weight of the box is (a) 6.832 kg (b) 7.576 kg (c) 7.76 kg (d) 8.56 kg

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