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Questions  

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

a
2
b
0.2
c
0.5
d
5

detailed solution

Correct option is C

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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