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Question

A tree is brokenby wind, itsupper part touches the ground at a point 10 meters from the foot of the tree and makes an angle of 45 with the ground. The entire length of the tree is  


A
15m
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B
20m
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C
10(1+ 2) m
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D
10(1+ 3/2) m
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Solution

The correct option is C $$10 (1 +$$ $$\sqrt{2}$$) m
AC = 10 = AB
BC = BC' = $$\sqrt{(10^2 + 10^2)} = 10\sqrt{2}$$
AC = AB + BC = 10 ($$\sqrt{2}$$  +1)
1083580_1006520_ans_0b44368246b74bba8e8ba77c73e93dc3.png

Physics

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