1.

Two objects at the points P and Q subtend an angle of 30^(@) at a point A. Lengths AR = 20 m and AS = 10 m are measured from A at right angles to AP and AQ respectively. If PQ subtends equal angle of 30^(@), at R and S, then length of PQ is

Answer»

`SQRT(300 - 200 sqrt(3))`
`sqrt(500 - 200 sqrt(3))`
`sqrt(500 sqrt(3) - 200)`
`sqrt(300)`

Answer :B


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