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Let veca,vecb, " and " vecc be three vec...

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

A

` 5sqrt2`

B

` (5)/(sqrt2)`

C

` 10 sqrt2`

D

` 10 sqrt3`

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The correct Answer is:
A
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