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A person standing on the bank of a river observes that the angle of elevation of the top of a tree standing on the opposite bank is `60^0dot` When he move 40 metres away from the bank, he finds the angle of elevation to be `30^0dot` Find the height of the tree and the width of the river.

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The correct Answer is:
20 m
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ICSE-HEIGHTS AND DISTANCES -Exercise 22 B
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  2. Find the height of a tree it is found that on walking away from is 20 ...

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  3. Find the height of a building, when it is found that on walking toward...

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  4. From the top of a light house 100 m high, t he angles of depression of...

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  5. From the top of a light house 100 m high, t he angles of depression of...

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  6. Two pillars of equal heights stand on either side of a roadway, which ...

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  7. From the figure, given below . calculate the length of CD

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  8. The angle of elevation of the top of a tower is observed to be 60^(@) ...

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  9. The angle of elevation of the top of a tower is observed to be 60^(@) ...

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  10. From the top of a building 60m high the angles of depression of the...

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  11. A man on a cliff observes a boat, at an angle of depression 30^(@) , w...

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  12. A man on a cliff observes a boat, at an angle of depression 30^(@) , w...

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  13. A man in a boat rowing away from a lighthouse 150 m high, takes2 minut...

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  14. A person standing on the bank of a river observes that the angle of ...

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  15. A person standing on the bank of a river observes that the angle of ...

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  16. The horizontal distance between two towers is 75 m and the angular de...

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  17. The length of the shadow of a tower standing of level plane is found ...

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  18. An aeroplane flying horizontally 1 km above the ground is observed ...

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  19. From the top of a hill, the angles of depression of two consecutive ki...

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