Question

By selling a T.V for ruppees 8000 a shopkeeper loses 20% of his cost. If he sells it for ruppees 11000 what profit or loss would be there for him?​

Answer 1

Let the edge length or side of the cube 'a', and the radius of each particle be r. The particles along the body diagonal touch each other. Thus the radius of an atom is √3/4 times the side of the body-centred cubic unit cell. The packing efficiency of the body-centred cubic cell is 68%

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