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Two particles 1 and 2 are allowed to des...

Two particles `1` and `2` are allowed to descend on the two frictionless chord `OA` and `OB` of a vertical circle, at the same instant from point `O`. The ratio of the velocities of the particles `1` and `2` respectively, when they reach on the circumference will be (OB is the diameter).

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{:("Column A","In the figure, two circle with centers A and B touch a larger circle with center O internally. The ratio of the radii of Circle A to Circle B is 7 : 9","Column B"),(OA,,OB):}