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Question

A tree is broken by the wind but does not separate. If the point from where it breaks is 9 m above the ground and its top touches the ground at a distance of 12 m from its foot, find out the total height of the tree before it broke.

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Solution

Let BD be the height of the tree broken at point C and suppose CD take the position CA




Now as per given conditions we have AB = 9 m , BC = 12 m

By Pythagoras theorem:
AC2 =AB2 + BC2

AC2 = 122 + 92 AC2= 144 + 81 AC2= 225AC2=152AC=15

Length of the tree before it broke = AC + AB
= 15 + 9
= 24 m

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