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A company sells biscuits. For packing pu...

A company sells biscuits. For packing purpose they are using cuboidal boxes : box `A to 3cm xx 8cm xx 20cm`, box `B to 4cm xx 12cm xx 10 cm`. What size of the box will be economical for the company? Why? Can you suggest any other size dimensions which has the same volume but is more economical than these?

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