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[" The three concurrent edges of a parallelopiped represent the vectors "vec a,vec b,vec c" such that "],[[vec a,vec b,vec c]=lambda" .Then the volume of the parallelopiped whose three concurrent edges are the "],[" three concurrent diagonals of three faces of the given parallelopiped is - "],[[" (a) "2 lambda," (b) "3 lambda],[" (c) "lambda," (d) none of these "]]

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