a wheel 15 centimetre in diameter makes 3000 Revolution per minute find its speed in metre per second
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it's speed in meter/second is 47.1 m/s
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speed=distance/time, 2πr=2×22/7×15/2 = 320/7×3000=960000/7cm =9600/7m, 9600/7/3600m/s =96/252 m/s
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