Question

2 gears. One with 12 teeth and the other one with 14 teeth are engaged with each other. One tooth in smaller gear and one tooth in bigger gear are marked and initially those 2 marked teeth are in contact with each other. After how many rotations of the smaller gear with the marked teeth in the other gear will again come into contact for the first time

Answer 1

Answer:

After 7 rotations of the smaller gear with the marked teeth in the other gear will again come into contact for the first time.

Explanation:

We will find the minimum distance cover by both the gears.

and by doing least common multiple we got the the distance is 84cm

Therefore to find the rotations we need to divide the distance with the number of teeth the gear has.

so the smaller gear has to 7 rotations to come into contact with the other gear.