Three wheels make 36, 24, 60 revolution/min. Each has a black mark on it. It is aligned at the start.When does it align again for the first time?

• LCM of 36, 24, 60 is 360.
  Values are given in minutes. Hence wheels will align after 360 mins or 6 Hours
• 9 years agoHelpfull: Yes(16) No(1)
• so simple
  we have to just find out HCF of 36,24,60=12
  12*3,12*2,12*5
  that means after 3,2,5 each wheel has black mark at the start
  time required to complete 36 rev is 60 sec then for 3 rev=5sec
  ans=5sec
• 9 years agoHelpfull: Yes(4) No(4)
• find out the LCM of 36,24,60
  it is around 180
  so after 180 min it will allign
• 9 years agoHelpfull: Yes(3) No(10)
• LCM of 36,24,60 is=360.
  so ans is 360
• 9 years agoHelpfull: Yes(1) No(0)
• after 360 min it will complete one revolution.
  
• 9 years agoHelpfull: Yes(0) No(0)
• ans: 360
  since it aligned at starting point then it again aligned when they all strike same time..for this we have to find the lowest common factor of it...
• 9 years agoHelpfull: Yes(0) No(0)
• 360
  taking lcm
  
• 9 years agoHelpfull: Yes(0) No(0)
• 360 is the LCM of 24,36,60.
• 9 years agoHelpfull: Yes(0) No(0)