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Let veca,vecbandvecc be three vectors s...

Let `veca,vecbandvecc` be three vectors such that `|veca|=3,|vecb|=4,|vecc|=5`and each one of them being perpendicular to the sum of the other two , find `|veca+vecb+vecc|`.

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The correct Answer is:
`5sqrt(2)`
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