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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.

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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