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Q.

The projections of a line segment on the axes are 1,2,2. If the length of the segment is n, then  log3n=

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a

2

b

0.2

c

0.5

d

5

answer is C.

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Detailed Solution

If the projections of a line segment on the axes are x1,y1,z1 then the length of the line segment is  x12+y12+z12The projections of a line segment on the axes are 1,2,2 and the length of the segment is nHence,n=1+4+4=3 It implies thatlog33=0.5
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