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A person standing on the bank of a river observes that the angle subtended by a tree on the opposite of bank is `60^(@)`. When he retires 40 m.from the bank, he finds the angle to be `30^(@)`. What is the breadth of the river ?

A

40 m

B

60 m

C

20 m

D

30 m

Text Solution

Verified by Experts

The correct Answer is:
C
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A person standing on the bank of a river observes that the angle subtended by a tree on the opposite of bank is 60^(@) . when he returns 40 m from the bank, he finds the angle to be 30^(@). What is the breadth of the river?

Problems based on finding the breadth of the river; exp-1A man standing on the bank of the river observes that the angle subtended by the tree on the opposite bank is 60^(0). When he retires 36m from the bank,he found the angle to be 30^(0). What is the breadth of the river.

A person standing on the bank of a river observers that the angle subtends by a tree on the opposite bank is 60^(@) . When he retires 40 feet from the bank, he finds the angle to be 30^(@) . Find the height of the tree and the breadth of the river.

A person standing on the bank of a river observes that the angle subtended by a tree on the opposite bank is 60^(@) , when he retreats 40m from the bank he finds the angle to be 30^(@) . Find the height of the tree and the breadth of the river.

MCGROW HILL PUBLICATION-HEIGHTS AND DISTANCES -EXERCISE (LEVEL-1 ( SINGLE CORRECT ANSWER TYPE QUESTIONS ))
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  7. A man in a boat rowed away from a cliff 150 m high takes 2 min, to cha...

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

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  11. The upper three-quarters of a vertical pole subtends an angle tan^(-1)...

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  12. PQ is a vertical tower and A, B, C are three points on a horizontal li...

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  13. ABCD is a rectangular park with AB = a. A tower standing at C makes an...

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  14. Two circular path of radii a and b intersect at a point O and AB is a ...

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  15. Three poles of height a, b, c stand on the same side of a road and sub...

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

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  17. If a flagstaff 6 metres high placed on the top of a tower throws a sha...

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  18. Three poles whose feet lie on a circle subtend angle alpha, beta, gamm...

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  19. A, B, C are three points on a vertical pole whose distances from the f...

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  20. A ladder rests against a wall at an angle of 35^(@). Its foot is pulle...

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