1.

Consider DeltaABC with incentre l(1,0). Equation of the straight lines AI,BI,CI are x=1, y+1= x and x+3y=1 respectively andcot A//2=2 If point A liea above the x-axis and area of DeltaABC is30 sq, units then the in radius of DeltaABC is

Answer»

`SQRT3`
`SQRT5`
2
`3sqrt2`

ANSWER :A


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