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An aeroplane at an altitude of 250 m obs...

An aeroplane at an altitude of 250 m observes the angle of depression of two boats on the opposite banks of a river to be `45^(@)and60^(@)` respectively. Find the width of the river. Write the answer correct to the nearest whole number.

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The correct Answer is:
394 m
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As observed from the top of a 80 m tall lighthouse, the angle of depression of two ships, on the same side of the light house in horizontal line with its base, are 30^(@) and 40^(@) respectively . Find the distance between the two ships. Given your answer correct to the nearest metre

An observer on the top of a cliff, 200 m above the sea-level, observes the angles of depression of the two ships to be 45^(@) and 30^(@) respectively. Find the distance between the ships, if the ships are on the same side of the cliff,

From a point on a bridge across a river the angles of depression of the banks on opposite side of the river are 30^o and 45^o respectively. If bridge is at the height of 30m from the banks, find the width of the river.

From a point of a bridge across a riuver, the angles of depression of the banks on opposite sides of the river are 30^(@) and 45^(@) , respectively. IF the bridge is at a height of 10 m from the banks, then find the width of the river. (Use sqrt3=1.73 )

ICSE-HEIGHTS AND DISTANCES -Exercise 22 C
  1. A vertical tower stands on a horizontal plane and is surmounted by a v...

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  2. With reference to the given figure, a man stands on the ground at poin...

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  3. With reference to the given figure, a man stands on the ground at poin...

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  4. The angles of elevation of the top of a tower from two points at a dis...

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  5. From a window A , 10 m above the ground the angle of elevation of the...

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  6. A vertical tower is 20 m high. A man standing at some distance from th...

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  7. A man standing on the bank of a river observes that the angle of elev...

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  8. A man standing on the bank of a river observes that the angle of elev...

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  9. A 20 m high vertical pole and a vertical tower are on the same level g...

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  10. A 20 m high vertical pole and a vertical tower are on the same level g...

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  11. A vertical pole and a vertical tower are on the same level ground in ...

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  12. A vertical pole and a vertical tower are on the same level ground in ...

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  13. From a point 36 m above the surface of a lake , the angle of elevatio...

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  14. A man observes the angle of elevation of the top of a building to be 3...

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  15. As observed from the top of a 80 m tall lighthouse, the angle of dep...

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  16. In the given figure, A from the top of a building AB = 60 m high, the ...

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  17. In the figure given, from the top of a building AB = 60 m high, the an...

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  18. An aeroplane at an altitude of 250 m observes the angle of depression ...

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  19. The horizontal distance between two tower is 120 m. The angle of eleva...

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  20. The angles of depression of two ships a A and B as observed from the t...

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