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Question

Let a, b, c be three non-coplanar vectors such that a b c=24 and a×b=6. Then the height the parallelopiped formed by a, b, c with a and b as two adjacent edges of the base, is ____________.

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Solution

Given a b c=24

a×b=6

when a and b are two adjacent edges of the base

Area of Base is a×b=6.

i.e c will represent height

Since Volume is given by a b c=24

i.e a×b·c=24i.e a×b·c=24i.e 6×c=24i.e c=4.

i.e height of the parallelepiped is 4.

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