The altitude of a parallelepiped whose three coterminous edges are vectors a¯=i¯+j¯+k¯,b¯=2i¯+4j¯−k¯ and c¯=i¯+j¯+3k¯ with a¯ and b¯ as sides of the base of the parallelopiped is
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a
419
b
219
c
23819
d
119
answer is C.
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Detailed Solution
Let a→=i^+j^+k^ b→=2i^+4j^-k^ c→=i^+j^+3k^ volume of parallelopiped is a¯ b¯ c¯ =11124-1113=4 base area whose sides are a¯,b¯ is =a×b=ijk11124-1 =38 height of parallelopiped= volume base area=438=