Question 1079710: Two balls A and B rotate along a circular track. Bought a makes 4 full rotations in 120 seconds. Ball B makes three full rotations in 60 seconds.if they start rotating now from the same point, when will they be at the same starting point again? Show your work
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! Two balls A and B rotate along a circular track. Bought a makes 4 full rotations in 120 seconds. Ball B makes three full rotations in 60 seconds.if they start rotating now from the same point, when will they be at the same starting point again?
---------
Ball A takes 30 seconds/rev, Ball B takes 20 seconds/rev
------
It's the LCM, Least Common Multiple = 60 seconds.
--> 2 revs for A, 3 for B
|
|
|
