Clock

How long is trajectory of second hand of hours for day, if is 15 mm long?

Correct result:

l =  135.7 m

Solution:

r=15 mmm=15/1000 m=0.015 m o=2π r=2 3.1416 0.0150.0942 m n=1 24 60=1440 l=n o=1440 0.0942=135.7 m



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