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The angle of elevation of a bird sitting...

The angle of elevation of a bird sitting on top of a tree as seen from the point at a distance of 20m from the base of the tree is `60^(@)`. Then, the height of the tree is ……..m

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The angle of elevation of the top of a tower at a distance 500m from the foot is 30^(@) . Then, the height of the tower is ………m.

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A statue, 1.6m tall, stands on the top of a pedestal. From a point on the ground, the angle of elevation of the top of the statue is 60^(@) and from the same point the angle of elevation of the top of the pedestal is 45^(@) . Find the height of the pedestal.

The angles of elevation of the top of a tower from two points at a distance of 4m and 9m from the base of the tower and in the same straight line with it are complementary. Prove that the height of the tower is 6m.

A statue stands on the top of a 2m tall pedestal. From a point on the ground, the angle ofelevation of the top of the statue is 60^(@) and from the same point, the angle of elevation of the top of the pedestal is 45^(@) . Find the height of the statue.

The angle of elevation of the top of a 15m high tower from a point 15m away from the base of the tower is………

A tree stands vertically on a hill side which makes an angle of 15^(@) with the horizontal. From a point on the ground 35m . Down the hill from the base of the tree, the angle of elevation of the top of the tree is 60^(@) . Find the height of the tree.

A person standing on the bank of a river observes that the angle of elevation of the top of a tree on the opposite bank is 60^(@) . When he retreates 20m from the bank, he observes the angle of elevation of the top of the same tree to be 30^(@) . Find the height of the tree and the breadth of the river.

NCERT GUJARATI-MOTION IN A STRAIGHT LINE-EXERCISES
  1. The angle of elevation of a bird sitting on top of a tree as seen from...

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  2. The position-time (x-t) graphs for two children A and B returning from...

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  3. A woman starts from her home at 9.00 am, walks with a speed of 5 km h^...

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  4. A drunkard walking in a narrow lane takes 5 steps forward and 3 steps ...

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  5. A jet airplane travelling at the speed of 500 km h^(-1) ejects its pro...

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  6. A car moving along a straight highway with speed of 126 km h^(-1) is b...

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  7. Two trains A and B of length 400 m each are moving on two parallel tra...

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  8. On a two-ane road, car A is travelling with a speed of 36 km h ^(-1). ...

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  9. Two towns A and B are connected by a regular bus service with a bus le...

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  10. A player throws a ball upwards with an initial speed of 29.4 ms^(-1) ...

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  11. Read each statement below carefully and state with reasons and example...

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  12. A ball is dropped from a height of 90 m on a floor. At each collision ...

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  13. Explain clearly, with examples, the distinction between : (a) magnitud...

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  14. A man walks on a straight road from his home to a market 2.5 km away w...

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  15. In Exercises 3.13 and 3.14, we have carefully distinguished between av...

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  16. Look at the graphs (a) to (d) (Fig.) carefully and state, with reasons...

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  17. Figure. shows the x-t plot of one-dimensional motion of a particle. Is...

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  18. A police van moving on a highway with a speed of 30 kmh^(-1) fires a b...

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  19. Suggest a suitable physical situation for each of the following graphs...

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  20. Figure. gives the x-t plot of a particle executing one-dimensional sim...

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