If A and B, 20 kms apart starts travelling towards each other at the speed of 5 and 10 Kms/hour.How far they are apart(in kms) one minute before they meet ?

• Relative speed = 5+10 = 15 kmph = 15*5/18 = 25/6 m/sec
  
  In 1 minute, they will cover 60*25/6 = 250 m.
  
  
  so they are 0.25 kms (250 mtrs) apart one minute before they meet.
• 12 years agoHelpfull: Yes(5) No(1)
• Relative speed = 5+10 = 15 kmph = 15/60 km per minute = 0.25 km/min
  
  so they are 0.25 kms (250 mtrs) apart one minute before they meet.
• 12 years agoHelpfull: Yes(5) No(0)
• they will meet in T=20/(5+10)=1.33HRS=80MIN
  
  IN 79 MIN,A TRAVELS =79/60*5=6.58KM
  B TRAVELS =79/60*10=13.16KM
  
  DIFFERENCE BETWEEN THEM=20-(13.16+6.58)=0.25KM
  
  
  
• 12 years agoHelpfull: Yes(3) No(3)
• @ Phani,
  
  Pls check.
  I think it is not necessary to calculate the total time taken to meet.
• 12 years agoHelpfull: Yes(1) No(0)
• @garima... they ask 1 min before the trains meet, but your calculation is 1min after the trains started from their point...so is it ryt?
• 12 years agoHelpfull: Yes(0) No(0)