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The length of the line segment whose pro...

The length of the line segment whose projection on the coordinate axes are of magnitudes 12,4,3 is (1) 13 (2) 17 (3) 19 (4) 21

A

19

B

13

C

11

D

none of these

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The correct Answer is:
B
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MCGROW HILL PUBLICATION-THE DIMENSIONAL GEOMETRY -EXERCISE (LEVEL 1 (SINGLE CORRECT ANSWER TYPE QUESTIONS))
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  2. The co-ordinates of the foot of the perpendicular from the point (3,-1...

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  3. The length of the line segment whose projection on the coordinate axes...

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  4. The number of lines which are equally inclined to the axes is :

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  5. Find the equation of a line which passes through a given point of posi...

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  6. If the line r=(i+j-k)+lambda(3i-j)andr=(4i-k)+mu(2i+3k) intersect at t...

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  7. Line of intersection of the two planes barr.(3i - j + k)=1 and barr.(i...

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  8. The plane x-2y+7z+21=0 (A) contains the line (x+1)/(-3)=(y-3)/2=(z+2)/...

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  9. A line passes through two points A(2,-3,-1) and B(8,-1,2). The coordin...

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  10. The plane x/a+y/b+z/c=1 meets the coordinaste axces in points A,B,C re...

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  11. The lines r=a+lambda(bxxc)andr=b+mu(cxxa) will intersect if

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  12. The shortest distance between the lines r=(4i-j)+lambda(i+2j-3k) and...

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  13. The co-ordinates of a point on the line x=4y+5,z=3y-6 at a distance 3s...

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  14. If theta denotes the acute angle between the line r=(i+2j-k)+lambda(i-...

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  15. Prove that the lines (x+1)/3=(y+3)/5=(z+5)/7a n d(x-2)/1=(y-4)/4=(z-6)...

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  16. Equation of a plane bisecting an angle between the plane r.(i+2j+2k)=1...

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  17. If the line (x-1)/(2)=(y-3)/(a)=(z+1)/(3) lies in the plane bx+2y+3z-4...

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  18. Equation of the plane passing through the points i+j-2k,2i-j+kandi+2j+...

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  19. The line of shortest distance between the lines (x-1)/(2)=(y+8)/(-7)...

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  20. If r.n=q is the equation of a plane normal to the vector n, the length...

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