TWO PERSONS are running from A in same direction with the speed 20 km/hr & 15 km/hr respectively. and from the other end another person is running 0in opposite direction with speed 30km//hr.
the total distance is 100 km
at what time will they meet ??

• The persons who are running in opposite direction can only meet with each other.So the person with 20 kmph and person with 30 kmph speed will meet after 2 hrs. and person with 15kmph will meet after 2.13 hrs.Three persons can never meet with each other.
• 11 years agoHelpfull: Yes(24) No(1)
• guys sory forgot to mention that mind keeping its nt a circular track problem.
• 11 years agoHelpfull: Yes(2) No(8)
• ans is lcm of 20,15,30 so the ans is 30hours
• 11 years agoHelpfull: Yes(2) No(14)
• They cant meet at the same tym wid differnt speeds
• 11 years agoHelpfull: Yes(2) No(2)
• not possible
  
• 11 years agoHelpfull: Yes(2) No(2)
• ans is
  111 hr
  
• 11 years agoHelpfull: Yes(2) No(5)
• ans is 2.85 h
  
• 11 years agoHelpfull: Yes(2) No(1)
• here it is not mentioned whether two persons will stop where they meet and wait for the 3rd person. if this wud be the problem then the ans is 2 hrs 40 mins otherwise its not possible
• 11 years agoHelpfull: Yes(1) No(2)
• Total distance = 100 km
  P1 goes speed of 20 km/h
  and P3 comes speed of 30km/h from the other end
  In 1st hour, p1 goes 20 km at that time p3 comes 30 km()
  In 2nd hour, p2 goes 40 km at that time p3 comes 60 km (40 + 60 = 100km)
  so after 2 hours they will meet each other(answer)
  speed of p2 is 15 km/h
  at 1st hour p2 goes 15 km whereas p3 comes 30 km (30 + 15 = 45 km)
  at 2nd hour p2 goes 30 km whereas p3 comes 60 km (60 + 30 = 90 km)
  Try to understand here
  when p2 goes 15 km at that time p3 comes 30 km
  Therefore when p2 goes 1 km p3 comes 30/15 = 2 km.
  after 2 hours distance between p2 and p3 is 10 km
  p2 goes 15 km in 60 minutes
  he will go 1 km in 4 minutes
  here p3 comes 30 km in 60 minutes ,
  so he will come 1 km in 2 minutes
  when p2 goes 3 km s in 12 minutes, at the same time p3 comes 6 km.
  hence after 2hours and 12 minutes distance between p2 and p3 is 1km.
  so the answer will be 2hours 14 minutes approx
  
• 11 years agoHelpfull: Yes(1) No(2)
• m nt getting solu..
  plz explain..
• 11 years agoHelpfull: Yes(0) No(2)
• in first 2 hr C run 60 and A rn 40 they meet after 2 hr ... but in 2 hr B can run only 30 km... so distance bet B and C is 10 km and reltive speed is 45 so they take 10/45 hr time more after 2 hr...
• 11 years agoHelpfull: Yes(0) No(0)
• mr.rajesh kumar sethi...according to me...they will never meet eachother....after 2hr and 14 minutes, what can you say about the position of P1...???
• 11 years agoHelpfull: Yes(0) No(1)
• 3 are never met together.....
• 10 years agoHelpfull: Yes(0) No(0)