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) 30.A manruns around a circle of diameter 100 mS at a speed of 12 km/h. then the time required totake 10 rounds of the circle will bepproximately):6 minutes35 minutesb) 25 minutesd) 46 minutes |
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Answer» Diameter =100mRadius=D/2=100/2=50mCircumference=2πr=2*22/7*50=314.28mHence in 10 rounds =10*314.28=3142.8m=3.1428kmSpeed=distance/timehence time=speed*distance=3.1428*12=3.77hrIn Minutes=3.77*60=25minutesoption b |
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