If the area of the triangle whose vertices are A (1, 2, 3), B (2, -1, 1) and C(1, 2, - 4) is lambda sq unit

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Q 2137123082.     If the area of the triangle whose vertices are

A (1, 2, 3), B (2, -1, 1) and C(1, 2, - 4) is lambda sq

unit then 20 sqrt(10) lambda must be

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