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For three vectors vec(a),vec(b) and vec(...

For three vectors `vec(a),vec(b)` and `vec( c ),vec(a)+vec(b)+vec( c )=vec(0)|vec(a)|=3,|vec(b)|=4,|vec( c )|=5`, then evaluate
`2(vec(a)*vec(b)+vec(b)*vec( c )+vec( c )*vec(a))`.

A

`100`

B

`50`

C

`-25`

D

`-50`

Text Solution

Verified by Experts

The correct Answer is:
D
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