Problema Solution
The speed of a bicycle gear, in revolutions per minute, is inversely proportional to the number of teeth on the gear. If a gear with 50 teeth has a speed of 21 revolutions per minute, what will be the speed of a gear with 35 teeth?
Answer provided by our tutors
let 'v' be the speed of a gear with 35 teeth
50 : 21 = 35 : v
by solving we find
v = 14.7 revolutions per minute
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