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If vec(a) and vec(b)= 3hat(i) + 6hat(j) ...

If `vec(a) and vec(b)= 3hat(i) + 6hat(j) + 6hat(k)` are collinear and `vec(a).vec(b)=27`, then `vec(a)` is equal to

A

`3(hat(i)+hat(j)+hat(k))`

B

`hat(i)+2hat(j)+2hat(k)`

C

`2hat(i)+2hat(j)+2hat(k)`

D

`hat(i)+3hat(j)+3hat(k)`

Text Solution

Verified by Experts

The correct Answer is:
B
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