railway RPF SI Mock Test Series 2024 Quantitative Aptitude Trigonometry Heights and Distances

An observer 2 m tall having angle of elevation of the top of the tower is 45°. The observer is 18 m away from the tower. What is the height of the tower from the bottom of tower?

1
40 m
2
10 m
3
20 m
4
30 m
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