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An arch is in the shape of a parabola wh...

An arch is in the shape of a parabola whose axis is vertically downwords and measures 24 mts across its boltom on the ground. Its highest point is 24 mts. The measure of the horizontal beam across its cross section at a height or 18 mts is

A

50 mt

B

40 mt

C

45 mt

D

55 mt

Text Solution

Verified by Experts

The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-PARABOLA-EXERCISE 1 A
  1. If a normal subtends a right angle at the vertex of a parabola y^(2)=4...

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  2. The normal at 'P' cuts the axis of the parabola y^(2) =4ax in G and S...

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  3. The circle passing through three conormal points also passes through

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  4. The normal at 'P' cuts the axis of the parabola y^(2) =4ax in G and S...

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  5. If the normals at two points on the parabola y^(2)=4ax intersect on t...

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  6. If the normals at two points on the parabola intersects on the curve t...

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  7. The locus of the point of intersection of perpendicular tangents to th...

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  8. The three normals from a point to the parabola y^(2)=4ax cut the axes...

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  9. If the normals from any point to the parabola x^(2)=4y cuts the line y...

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  10. If a circle cuts the parabola y^(2)=4ax in four points then the algebr...

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  11. The feet of the normals to y^(2)= 4ax from the point (6a,0) are

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  12. If P(-3, 2) is one end of focal chord PQ of the parabola y^(2)+ 4x + 4...

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  13. The normal at a point P on the parabola y^(2)=4ax cuts the curve aga...

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  14. The subnormal of the parabola y^(2)=4ax is equal to

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  15. The length of the subnomal to the curve y^2=2px is

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  16. If P is a point on the parabola y^(2)=4ax such that the subtangent and...

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  17. If PSP^(1) is a focal chord of a parabola y^(2)=4ax and SL is its semi...

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  18. An arch is in the shape of a parabola whose axis is vertically downwor...

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  19. The points on y=x^2+7x+2 which is closest to the line y=3x-3 is

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  20. Let P be the point on the parabola y^(2)=8x which is at a minimum dis...

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