Answers

2015-04-05T19:05:51+05:30
seconds hand of the clock completes a round in 60 sec/1min.As the time cannot be changed according to the size of the clock they both will take the same time to complete one round of the clock.
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2015-04-05T20:10:51+05:30
Both the clock complete a round in the same time. It is because time  cannot be changed. All the clocks  are set to the same time according the diameter of the clock.
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