Two poles of height a and b stand at the...

Two poles of height a and b stand at the centers of two circular plots which touch each other externally at a point and the two poles subtend angles of 30° and 60° respectively at this point, then distance between the centers of these plots is

a + b

`(3a + b)//sqrt(3)`

`(a + 3b)//sqrt(3)`

`a sqrt(3) + b`

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