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The length of the shadow of vertical pol...

The length of the shadow of vertical pole of height h, thrown by the sun's rays at thre different movements are h,2h,3h. The sum of the angles of elevation of rays at these three moments is equal to

A

`(pi)/(2)`

B

`(pi)/(3)`

C

`(pi)/(4)`

D

`(pi)/(6)`

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The correct Answer is:
A
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AAKASH SERIES-HEIGHTS AND DISTANCES-PRACTICE SHEET Exercise-I (Level-I) (Straight Objective Type Questions)
  1. The tops of two poles of heights 10 metres and 12 metres are connected...

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  2. At a certain point the angle of elevation of a tower is found to be co...

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  3. The length of the shadow of vertical pole of height h, thrown by the s...

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  4. A person observes the top of a tower from a point A on the ground. the...

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  5. From the top of a tree, a man observes the angle of deppression of a p...

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  6. From the top of a chiff 30 metres high, the angle of elevation of the ...

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  7. A tower subtends an angle alpha at a point A on the same level as the ...

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  8. From the top of the hill h meers high the angles of depressinons of th...

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  9. The angle of elevation of a stationar cloud from a point 2500 m above ...

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  10. The angle of elevation of the top point P of a vertical tower PQ of he...

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  11. The angle of elevation of the top of the tower is 45^(@) on walking up...

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  12. A flag-staff stands on a tower which is on level ground. The total hei...

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  13. A flag staff stands vertically on a pillar. The height of the flag sta...

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  14. A tower stands at the top a hill whose height is three times the heigh...

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  15. The upper 3/4th portion of a vertical pole subtends an angle tan^(-1)(...

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  16. A verrical pole subtends an angle tan^(-1)"1/2 at a points P on the gr...

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  17. A vertical pole more than 100ft high consists of two portions the lowe...

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  18. A straight pole A subtend a right angle at a point B of another pole a...

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  19. A tower of x metres high, has a flagstaff at its top. The tower and th...

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  20. From a point E on the horizontal due to east of a tree, the top of the...

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