defence exam ITBP (Telecommunication) Head Constable Mock Test 2024 Mathematics Vector Algebra Types of Vectors
If \(\rm \vec{i} - a\vec{j} + 5\vec{k}\)and \(\rm 3\vec{i} - 6\vec{j} + b\vec{k}\) are parallel vectors then b is equal to?
1
5
2
10
3
15
4
20