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A stone of mass of 16 kg is attached to a string 144 m long and is whirled in a horizontal circle. The maximum tension the string can withstand is 16 Newton. The maximum velocity of revolution that can be given to the stone without breaking it, will be 

(1) 20 ms–1

(2) 16 ms–1

(3) 14 ms–1

(4) 12 ms–1