Answer :

The figure is shown below:



Let the side of square be 2x


Also, RS = 2x


RS is also the diameter of the circle.


Radius


Now,


Area of square = 4 × side


= 4 × 2x


= 8x


Area of green region(circle) = πr2


= π x2


Probability of dot is putted in the green part







= 0.40x (approx.)


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