A and B walk around a circular track. They start at 9 a.m. from the same point in the opposite directions. A and B walk at a speed of 2 rounds per hour and 3 rounds per hour respectively. How many times shall they cross each other before 9.30 a.m.?

• Relative speed of A & B = (2+3)= 5
  So, they cross each other 5 times in an hour and 2 times in half an hour
  (9.00-9.30)=half an hour .,so ans will be 2 times
• 11 years agoHelpfull: Yes(6) No(5)
• i guess 2 times before 9:30a.m.
  if we talk about by 9:30 then 3 times
• 11 years agoHelpfull: Yes(0) No(4)
• 3 times meet............
• 11 years agoHelpfull: Yes(0) No(2)
• only 1 time because..
  A can walk 1 round for 30 min and B can walk 1 round for 20 min so A can reach the starting point and B can reach the 1 and half round distance then after 9.30 a.m they cross each other only 1 time
• 11 years agoHelpfull: Yes(0) No(2)