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Question:

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

5√2(2+√3)

10(√3-1)

5(2+√3)

5(√3+1)

Solution:

The correct option is C
5(2+√3)
tan15°=5/x
√2-√13=5/x
=>x=5(2+√3)