A & B are two places. C & D start walking from A and B respectively. Before meeting D, C travel 18m more than D. then C takes 13 and half minute and D take 24 minute to reach their destination.
124
126
127
128

• QUESTION INCOMPLETE
  
  A & B two places. C & D are two people. C started from A and D started from B. When they meet each other in the way C traveled 18 m more than D. Then C takes 13 and half a minute and D takes 24 minutes to reach the other end. What was the distance between A & B in meters.
  124
  126
  127
  128
  
  Ans: 126
• 8 years agoHelpfull: Yes(5) No(2)
• after meeting, ratio of there speed is c/d=root(24/(27/2))
  c/d=4/3
  after meeting c covers x meter in 27/2 sec at speed of 4
  so, x=4*(27/2)
  x=54
  total distance is x+(x+18)
  so, 54+54+18=126
• 8 years agoHelpfull: Yes(2) No(1)
• answer is 126
  their speed in ratio 4:3
  7*18=126
• 8 years agoHelpfull: Yes(0) No(7)
• Let C travels (z+18) km D travels z km
  
  Since both of them have taken same time for this,
  
  (
  z
  +
  18
  )
  Speed of C
  =
  z
  Speed of D
  (z+18)Speed of C=zSpeed of D
  
  or
  Speed of C
  Speed of D
  =
  z
  +
  18
  z
  Speed of CSpeed of D=z+18z ---(A)
  
  Time taken by C to travel z distance = 13.5 minutes
  
  => Speed of C =
  z
  13.5
  z13.5 ---(1)
  
  Time taken by D to travel (z+18) distance = 24 minutes
  
  => Speed of D =
  z
  +
  18
  24
  z+1824 ---(2)
  
  From (1) and (2),
  
  Speed of C
  Speed of D
  =
  z
  13.5
  z
  +
  18
  24
  =
  24
  z
  13.5
  (
  z
  +
  18
  )
  Speed of CSpeed of D=z13.5z+1824=24z13.5(z+18) --(B)
  
  From (A) and (B),
  
  z
  +
  18
  z
  =
  24
  z
  13.5
  (
  z
  +
  18
  )
  z+18z=24z13.5(z+18)
  
  13.5
  (
  z
  +
  18
  )
  2
  =
  24
  z
  2
  13.5(z+18)2=24z2
  
  (
  z
  +
  18
  )
  2
  =
  8
  z
  2
  (z+18)2=8z2
  
  (
  z
  2
  +
  36
  z
  +
  324
  )
  =
  1.78
  z
  2
  (z2+36z+324)=1.78z2
  
  .78
  z
  2
  −
  36
  z
  −
  324
  =
  0
  .78z2−36z−324=0
  
  x
  ≈
  54
  x≈54
  
  Distance between A & B = z + z + 18 = 54 + 54 + 18 = 126 meter
• 8 years agoHelpfull: Yes(0) No(14)
• after meeting, ratio of there speed is c/d=root(24/(27/2))
  c/d=4/3
  after meeting c covers x meter in 27/2 sec at speed of 4
  so, x=4*(27/2)
  x=54
  total distance is x+(x+18)
  so, 54+54+18=126
• 2 years agoHelpfull: Yes(0) No(0)