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If vec a is perpendicular to vec b ...

If ` vec a ` is perpendicular to ` vec b and vec c | vec a| =2 | vecb | =3, | vec c | =4` and the angle between` vecb and vec c " is " (2pi)/(3), " then " [vec a vecb vec c ] ` is equal to :
a)` 4sqrt3`b) ` 6 sqrt3` c)` 12 sqrt3`d) ` 18 sqrt3`

A

` 4sqr3`

B

` 6 sqrt3`

C

` 12 sqrt3`

D

` 18 sqrt3`

Text Solution

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The correct Answer is:
C
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