Question

3 balls rotate along a circular track. Ball A makes one full rotation in 6 seconds. Ball B makes 9 seconds and ball C makes 12 seconds. If the three balls start rotating from the same point and at the same time now, after how many seconds will they all be at the same point again? 

A25 seconds
B30 seconds
C36 seconds
D42 seconds

Answer 1

hey friend here is your answer
there are 3 balls
A, B AND C all take own rotation second a= 6 b=9 , c=12 they both start same time so answer is a