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Two poles standing on a horizontal ground are of heights 5 m and 10 m respectively. The line joining their tops makes and angle of 15° with the ground. Then the distance (in m) between the poles, is :

1. 10 ( 3 –1)
2. 5(2 + 3 )
3. 5( 3 + 1)
4. 2 5 (2+ 3 )

Correct answer: 5(2 + 3 )

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