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An observer 1.8 m tall stands away from a chimney at a distance of 38.2 m along the ground. The angle of elevation of top of chimney from the eyes of observer is $45^\circ$. The height of chimney above the ground is
- (a)38.2 m
- (b)36.4 m
- (c)40 m
- (d)$(38.2)\sqrt{2}$ m
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(C) 40 m