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Perpendicular Distance of a Point from a Plane

Write the len...

Question

Write the length (magnitude) of a vector whose projections on the coordinate axes are 12, 3 and 4 units.

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Solution

Given: Projection on the coordinate axes are $12, 3, 4$ units. Therefore,
Length of vector $= \sqrt{12^{2} + 3^{2} + 4^{2}}$
= $\sqrt{169}$
= 13

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