1.

A tree is broken by wind, its upper part touches the ground at a point 10 metres from the foot of the tree and makes an angle of\[{{45}^{o}}\]with the ground. The total length of tree is  [BIT Ranchi 1992]

A. 15 metres
B. 20 metres
C. \[10\,(1+\sqrt{2})\]metres
D. \[10\,\left( 1+\frac{\sqrt{3}}{2} \right)\]metres
Answer» D. \[10\,\left( 1+\frac{\sqrt{3}}{2} \right)\]metres


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