A vector is represented by 3i^+j^+2k^. It's length in X-Y plane will be?

Option:

a)2

b)rt14

c)rt10

d)rt5

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Solution

⃗

R

=3^i+^j+2^k
∴ Length in XY plane =√R2x+R2y=√32+12=√10

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