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A straight rot of length 9 units slides ...

A straight rot of length 9 units slides with its ends A,B always on the X and Y axis respectively . Then , the locus of the centroid of `DeltaOAB` is

A

`x^(2)+y^(2)=3`

B

`x^(2)+y^(2)=9`

C

`x^(2)+y^(2)=1`

D

`x^(2)+y^(2)=81`

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The correct Answer is:
B
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OBJECTIVE RD SHARMA ENGLISH-CIRCLES-Chapter Test
  1. A variable circle passes through the point A(a,b) and touches the x-a...

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  2. The radius of the circle r^(2)-2sqrt(2r) (cos theta + sin theta)-5=0, ...

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  3. A straight rot of length 9 units slides with its ends A,B always on th...

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  4. Find in-radius of the triangle formd by the axes and the line 4x+3y-12...

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  5. A line is at a distance 'c' from origin and meets axes in A and B. The...

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  6. The number of circles that touch all the straight lines x+y-4=0, x-y+2...

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  7. Find the number of integral values of lambda for which x^2+y^2+lambdax...

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  8. The four points of intersection of the lines (2x-y+1)(x-2y+3)=0 with t...

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  9. If 2x+3y-6=0 and 9x+6y-18=0 cuts the axes in concyclic points, then th...

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  10. The line lx+my+n=0 intersects the curve ax^2 + 2hxy + by^2 = 1 at the ...

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  11. Two circles, each of radius 5, have a common tangent at (1, 1) whose e...

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  12. PQ is a chord of the circle x^(2)+y^(2)-2x-8=0 whose mid-point is (2, ...

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  13. The number of circles belonging to the system of circles 2(x^(2)+y^(2)...

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  14. If (-1/3,-1) is a centre of similitude for the circles x^2+y^2=1 and x...

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  15. Statement 1 : The equation x^2+y^2-2x-2a y-8=0 represents, for differe...

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  16. x=1 is the radical axis of the two orthogonally intersecting circles....

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  17. about to only mathematics

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  18. The circles x^(2)+y^(2)+6x+6y=0 and x^(2)+y^(2)-12x-12y=0:

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  19. The equation of the pair of straight lines parallel tox-axis and touch...

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  20. The equation of the circumcircle of the triangle formed by the lines x...

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