The angle of elevation from a point on the ground to the top of the chimney is 30°. After walking 100 feet towards chimney the angle becomes 45°, then what is the height of the chimney?

The angle of elevation from a point on the ground to the top of the chimney is 30°. After walking 100 feet towards chimney the angle becomes 45°, then what is the height of the chimney?

1). 45
2). 200
3). 100
4). 136.6

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