Two boys A and B are at two diametrically opposite points on a circle. At one
instant the two start running on the circle; A anticlockwise with constant speed v
and B clockwise with constant speed 2v. In 2 minutes, they pass each other for
the first time. How much later will they pass each other for the second time?
1. 1 minute
2. 2 minutes
3. 3 minutes
4. 4 minutes

• In 2mints A covers dist=2v unit and B covers dist=4v unit.
  Total dist become they covers =4v+2v=6v unit.
  Total perimeter=6v+6v=12v.
  Combining speed of A and B is v+2v=3v.
  Time=12v/3v=4 mints.
  Ans:d.4 mints.
• 10 years agoHelpfull: Yes(1) No(0)
• A is standing at one end of diameter of circle and B is standing anotherend of diameter in circle...
  speed of A ix v and speed of B is 2v that means if A travels 1/2 parameter of circle then covers a total round of circle.If in 2min they meet each other then after 1min A will cover 1/2of the parameter of circle and and B will complete full circle after another 1 min A will cover full circle and B wil again cover the full circle...so ans is 2min
  after 2min they will meet each other again
  Ans 2min
• 10 years agoHelpfull: Yes(0) No(1)