In the following figure, PQRS is square lawn with side PQ = 42 metres. Two circular flower beds are there on the sides PS and QR with centre at O, the intersections of its diagonals. Find the total area of the two flower beds (shaded parts
prove that the perpendicular at the point of contact to the tangent to a circle passes through the centre.
first bag contains 3 red 4 black balls bag second contains 4 red 5 black and one ball is transformed from bag 1 to 2 than a ball is drawna from bag second and it was found to be red