Tractor's 7352

The tractor's rear wheels have a diameter of 1.25 m, and the front wheels have a diameter of 55 cm. What is its speed? How many times does each wheel turn on a 1.5 km track?

Correct answer:

r =  11:25
n1 =  382
n2 =  868

Step-by-step explanation:

d1=1.25 m d2=55 cm m=55:100  m=0.55 m  r=d2/d1=0.55/1.25=0.44=11:25
s=1.5 km m=1.5 1000  m=1500 m o1=π d1=3.1416 1.253.927 n1=s/o1=1500/3.927=382
o2=π d2=3.1416 0.551.7279 n2=s/o2=1500/1.7279=868

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