Question

The vectors sum of two vectors of magnitudes $10$ units and $20$ units can never be?

• A. $28$ units
• B. $22$ units
• C. $18$ units
• D. $8$ units

Answer 1

The correct option is A $28$ units

Vector sums of two vectors C lies between A + B and A-B

Thus the conditions are

$A+B>C\ge A-B$

$10+15>C\ge 10-15$

$25>C\ge -5$

Thus from provided options C can never be 28 units.