one gear of pulley rotates at a speed of 3 rev/sec another gear roates at 5 rev/sec. if both start together after how many seconds will they be together again
3 sec
5sec
15 sec
20 sec

• Take the L.c.m of 3 and 5 so that u can easily find the meeting of that two gears .
  3. 5
  15.
  5. 3
• 7 years agoHelpfull: Yes(9) No(0)
• 3 rotates 3,6,9,12,15
  5 rotates 5,10,15
  because ans is 15
  
• 7 years agoHelpfull: Yes(9) No(2)
• etna easy question nahi aata hh infosys me
  
  kuch bhi...........
• 7 years agoHelpfull: Yes(6) No(18)
• lcm of 3&5 will be the answer.so15
• 7 years agoHelpfull: Yes(3) No(0)
• As the l.c.m. of 3 and 5 is 15 so the answer is 15.
• 7 years agoHelpfull: Yes(2) No(0)
• Lcm of 3,5 which is 15
• 7 years agoHelpfull: Yes(1) No(0)
• Lcm of 3 and 5 = 15
• 7 years agoHelpfull: Yes(1) No(0)
• 15 sec
• 6 years agoHelpfull: Yes(1) No(0)
• lcm of 3 and 5 will together then =>3.5=15
• 6 years agoHelpfull: Yes(1) No(0)
• 15 sec.. since lcm of 3 and 5 is 15
• 5 years agoHelpfull: Yes(1) No(0)
• lcm of 3, 5 =15
• 5 years agoHelpfull: Yes(1) No(0)
• common multiple of 3 and 5 which is lcm of 3 and 5 that is 15
• 5 years agoHelpfull: Yes(1) No(0)
• Logically they will be together every second..
  explanation: After every 3 rev pully A comes to initial state. At the sametime B rev 5 rev and come to initial state.
  Practical answer for the question is "(evry second)" :|
• 3 years agoHelpfull: Yes(0) No(0)