Tractor wheels

The front wheel of the tractor has a circumference of 18 dm and the rear 60 dm. We will make a red mark on the lowest point of both wheels. The tractor then starts. At what distance from the start will both marks appear identically at the bottom again?

Correct result:

x =  18 m

Solution:

a=18 dm b=60 dm  18=232 60=2235 LCM(18,60)=22325=180  c=LCM(a,b)=LCM(18,60)=180 dm  x=c m=c/10  m=180/10  m=18 m



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