📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!
  • google app store apple app store
    • ✖

      Question

      The time taken by train B to cross a platform of 120

      metres is 3 sec less than the time taken by train A to cross the same platform. The sum of length of train A and B is 600 metres. The ratio of speeds of trains A and B is 3:2 respectively. Find the speed of train B.
      A 25 m/s Correct Answer Incorrect Answer
      B 45 m/s Correct Answer Incorrect Answer
      C 36 m/s Correct Answer Incorrect Answer
      D Can't be determined Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let the length of train A = LA  and length of train B = LB  respectively, Speed of train A = 3x, Speed of train B = 2x.

      From the problem:

      Substitute LB = 600 − LA into the equation and simplify: 2LA − 3LB − 120 = 18x,

      Solve to get LA = 18x/5 + 384. Use this relation to calculate 'x' or LA with additional constraints or assumptions about 'x' is not mention  Hence, it Can't be determined

      Practice Next
      More Trains Questions
      ask-question