Bicycle gear

The pedal bicycle wheel has 56 teeth and a rear 20 gear tooth. How many times does the bicycle wheel turn when you make 20 turns of the pedal wheel?

Result

n =  56

Solution:

s1=s2 56 20=20 n  n=20 5620=56s_{ 1 } = s_{ 2 } \ \\ 56 \cdot \ 20 = 20 \cdot \ n \ \\ \ \\ n = 20 \cdot \ \dfrac{ 56 }{ 20 } = 56



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