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CBSE Class 9 Answered

the upper part of tree broken by wind makes an angle of 45 with the ground and horizontal distance from the foot of the tree to the point where the top of tree touches the ground is 12 m, find the height of tree before it was broken ?
Asked by nisha_vini29 | 11 Jan, 2016, 10:13: AM
answered-by-expert Expert Answer

 

I n space t h e space f i g u r e comma space A C space i s space t h e space b r o k e n space p a r t space o f space t e space t r e e space a n d space A B space i s space t h e space r e m a i n i n g space p a r t space p f space t h e space t r e e. W e space g e t space a space 45 minus 45 minus 90 space t r i a n g l e. A B equals B C equals 12 space m A C equals 12 square root of 2 H e i g h t space o f space t h e space t r e e equals space b r o k e n space p a r t space plus space r e m a i n i n g space p a r t equals A C space plus thin space A B equals space 12 space plus space 12 square root of 2 equals 12 open parentheses 1 plus square root of 2 close parentheses

Answered by | 11 Jan, 2016, 18:41: PM

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