the diameter of a train wheel is 42 cm and the train wheels completes 1200 revolutions in a minute what's the speed?
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Answer:
95.04 km/hr
Step-by-step explanation:
r=42/2=21
distance covered in 1 minute = 2πr *1200= 158400cm/min
convert it into km/hr = 158500*0.0006= 95.04km/hr
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