Find the altitude of a parallelopiped de...

Find the altitude of a parallelopiped determined by the vectors `veca=hati+hatj+hatk, vecb=2hati +4hatj-hatk` and `vecc=hati+hatj+3hatk`, if the base is taken to the parallelogram determined by `veca` and `vecb`.

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The correct Answer is:

`(4)/(sqrt(38))` unit

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