If PQbe the projections of 3,−2,4on the coordinate planes xy,yzrespectively then PQ is

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answer is C.

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Detailed Solution

The projection 3,−2,4of onxy plane is P3,−2,4 The projection 3,−2,4of on yzplane is Q0,−2,4The distance between the points PQ=32+0+42=5

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