Particles P and Q are undergoing uniform horizontal circular motions along concentric circles of different radii in clockwise sense P completes each round in 2 min while Q does it is 5 min time required by Q to make one revolution around P is

Time taken by Q to make one revolution around P = Time taken by Q to complete one revolution – time taken by P to complete one revolution = 5 mins – 2 mins = 3 mins

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