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Question

The area of the parallelogram whose adjacent sides are 2i - 3k and 4j + 2k is

A
2(14)
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B
4(14)
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C
16(14)
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D
(14)
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Solution

The correct option is B 4(14)
Let a=2i3k,b=4j+2k
Thus a×b=∣ ∣ijk203042∣ ∣=12i4j+8k=4(3ij+2k)
Hence area of parallelogram =|a×b|=414

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