Subject :IMO Class : Class 4
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
How to solve this problem?please help
Ans 1:
Class : Class 8
36 SECONDS
Ans 2:
Class : Class 8
36 sec
Ans 3:
Class : Class 5
Ball A rotates in 6 seconds, ball B in 9 seconds and ball C in 12 seconds. So we have to take out the LCM of the three numbers. LCM = 36. So the answer is 36 seconds.
Ans 4:
Class : Class 5
Ball A rotates in 6 seconds, ball B in 9 seconds and ball C in 12 seconds. So we have to take out the LCM of the three numbers. LCM = 36. So the answer is 36 seconds.
Ans 5:
Class : Class 9
c)36 seconds
Ans 6:
Class : Class 4
36