Practicing Success
CUET Preparation Today
CUET
-- Mathematics - Section B1
Vectors
If $(\vec{a}-\vec{b}) \cdot(\vec{a}+\vec{b})=27$ and $|\vec{a}|=2|\vec{b}|$, then $|\vec{b}|$ is:
3
2
$\frac{5}{6}$
6
The correct answer is Option (1) → 3