A & B two train,A starts from Mumbai with 51 kmph speed towards delhi at 12pm and B starts from Delhi to mumbai @ 49 kmph at 1pm, distance bw them is 273 km and each min of time B calculates dist bw them so how many times b calculates distance as whole number?

• ANs: 44 time distance between them will be whole number
  
  distance bw trains =273km
  At 1pm distance bw trains=273-51=222km
  both trains are coming in opposite direction so total speed=51+49=100kmph=5/3kmpm
  so each min the distance travelled by both trains is 5/3km
  so if we start counting 5/3(1st min), 10/3(2nd min), 15/3(3rd min)........
  between every 5km dis travelled by A and B ....B once note a whole no
  so 222/5=44 ans
  
• 10 years agoHelpfull: Yes(45) No(10)
• ans: 47
  distance bt train =273km
  after 1 hr at 1pm the remaining distance is=273-52=222km
  relative speed=51+49=100kmph
  in min speed is=100/60=5/3
  that means after every 3 mins distance between the train will be a whole number.
  total time to meet the trains=222/100=2.22hr
  we know that in every 3 min the drive not distance as a whole number
  1st hr+2nd hr+22min= 20+20+7=47 times
• 10 years agoHelpfull: Yes(20) No(17)
• oye miss pooja......2.22 hrs mtlb 2hrs aur 22 mints nhi hota.....
• 9 years agoHelpfull: Yes(8) No(2)
• distance between trains=273km
  at 1pm distance between trains=273-51=222km
  both trains arecoming in opposite directions so total speed=51+49=100km
  so each min the distance travelled by both trains is 5/3kmpm
  between every 5/3km distance travelled by trains.... b once note a whole number
  so 222/(5/3)=133
  
• 10 years agoHelpfull: Yes(6) No(10)