If(|\vec {a}+\vec {b}|=15, |\vec {a}-\vec{b}| =10,|\vec a|=\... | Mathematics | SolveeIt | Solveeit

Today, August 18

Question

If $|\vec {a}+\vec {b}|=15, |\vec {a}-\vec{b}| =10,|\vec a|=\frac{11}{2}$ then the value of | $\vec b$ | is/are:

A

$\frac{23}{2}$

B

$± \frac{23}{2}$

C

$±23$

D

$\frac{23}{\sqrt2}$

Answer

$\frac{23}{2}$

Explanation

Solution

The correct option is(A): $\frac{23}{2}$