Q. 30

Mark (√) against

Given volume of the parallelepiped is 216 cubic units

Given

And

= are the coterminous edges of the parallelepiped.

[216

216=

216=5[21-(-2]-(-4)[28-]+1[-8-3]

216=5[21+2]+4[28-λ]+1[-11]

216= 105 +10 λ +112 -4 λ -11

216-105-112+11=6 λ

6 λ =10

=

⇒ λ =

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