If p=7hati-2hatj+3hatk and q=3hati+hatj+...

If `p=7hati-2hatj+3hatk and q=3hati+hatj+5hatk`, then find the the magnitude of p-2q.

A

`sqrt29`

B

4

C

`sqrt62- 2 sqrt35`

D

`sqrt66`

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The correct Answer is:

D

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