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Mathematics
Problem
If a pole 6 m high casts a shadow
2
3
2\sqrt{3}
2
3
m long on the ground, then the Sun's elevation is (1)
30
∘
30^\circ
3
0
∘
(2)
45
∘
45^\circ
4
5
∘
(3)
60
∘
60^\circ
6
0
∘
(4)
90
∘
90^\circ
9
0
∘
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