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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 on the opposite bank of the river is `60^@` and where he retires 40 meters away from the tree the angle of elevation becomes `30^@`. The breadth of the river is

A

40 m

B

30 m

C

20 m

D

60 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 of elevation of the top of a tree standing on the opposite bank is 60^(@) . When he moves 40 meter away from the bank, he finds the angle of elevation to be 30^(@) . Find the height of the tree and width of the river " [take", sqrt(3)=1.732]

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^(@) . When he move 40metres away from the bank, he finds the angle of elevation to be 30^(@). Find the height of the tree and the width of the river.

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^(@) . When he moves 40 m away from the bank, he finds the angle of elevation to be 30^(@) . Find the height of the tree and the width of the river. (sqrt3=1.73)

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^(@) . When he moves 40 m away from the bank, he finds the angle of elevation to be 30^(@) . Find the height of the tree and width of the river. (sqrt3 =1.73)

A person standing on the bank of a river finds that the angle of elevation of the top of a tower on the opposite bank is 45^@ , then which of the following statements is correct ?

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.

MCGROW HILL PUBLICATION-HEIGHTS AND DISTANCES -QUESTIONS FROM PREVIOUS YEARS. AIEEE/JEE MAIN PAPERS
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