An express A starts at 2.30 pm from nampali station and travels towards vizag station at speed of 80 kmph. Another expressstarts at 4.30 pmfrom nampali station to vizag station at speed of 100 kmph. How far awayfrom station Nampali will the two trains meet??

A.600 km
B.700 km
C.750 km
D. 800 km

• Let train A take x hours to reach the point of meeting(let it be P)
  Then train B will reach the same point in x-2 hours.
  Distance covered to reach P by train A in x hours=Distance covered by B to reach P in x-2 hrs.
  80*x=100(x-2)
  80x=100x-200
  x=10 hrs.
  Distance from Nampali=x*speed of train A
  =10*80
  =800 km
• 9 years agoHelpfull: Yes(25) No(0)
• train A goes 80 km for one hr it start at 2.30. and train B goes 100 km for one hr but it start 2 hrs late.
  when A goes 80km. B doesnot go 0km.
  when A goes 160km B doesnot go 0 km bcs of 2hr late.
  A B
  240 100
  320 200
  400 300
  480 400
  560 500
  640 600
  720 700
  800 800
  A reaches nampali after 10 hrs. B reaches nampali after 8 hrs. and the Distance between station to nampali will the two trains meet is 800km.
• 9 years agoHelpfull: Yes(20) No(0)
• express A travels for 2 hours initially, covering 160 km.
  express B has to cover this distance in order to catch A at a speed of (100-80) = 20kmph [covering 20km of distance per hour w.r.t. express A]
  hence, 160/20 = 8 hr
  distance covered = 8*100 = 800km
• 9 years agoHelpfull: Yes(12) No(0)
• Distance to be covered by 2nd train = 80*2=160km
  relative speed=100-80=20kmph
  total time to meet=160/20=8hrs
  total distance= 8*100=800kms
  
• 9 years agoHelpfull: Yes(3) No(1)
• 80*2 + 80*x = 100*x
  x= 8 hrs
  Therefore, distance at which they will meet is 8*100= 800km
• 9 years agoHelpfull: Yes(2) No(2)
• A star at 2:30 And B star at 4:30
  so A takes 2 hours more
  so A cover distance in two hours =80*2=160;
  both A and B move in the same direction so to total speed is a subtraction of distance=(100-80)=20kmph
  now they meet after=160/20=8hour
  so distance =8*100=800km
• 6 years agoHelpfull: Yes(1) No(0)
• 800 km as from 2:30 to 12;30 A will reach and b will also reach 800 km at 12:30
• 9 years agoHelpfull: Yes(0) No(0)
• 800km
  after two hour express A will be 160KM ahead of express B.so from that point they will take equal time to meet. so we can equate time for both " A and B" and than we can get 800Km as answer
• 7 years agoHelpfull: Yes(0) No(0)
• option d)800 km
• 6 years agoHelpfull: Yes(0) No(0)
• This problem we can solve using relative speed concept. The 1st train started at 2:30pm and 2nd train started at 4:30.
  so what is time gap=2 hrs.
  since 1st train started 1st : in 2hrs it will cover 80kmph * 2hr =160 km
  after this 2hrs train 2 started. in relative speed concept we stop the 1st train and take the relative speed of 2nd train is 100-80 = 20kmph (since there are travelling in same direction)
  time for second train to meet is 160/20 = 8hr
  so the distance from nampali is = 8hr * 100kmph = 800km
• 4 years agoHelpfull: Yes(0) No(0)