DSSSB · Mathematics

A 215 m long train A is moving at a speed of 35 m/s and a 225 m long train B is moving in the opposite direction at a speed of 45 m/s. In how many seconds will train B completely cross train A?

  1. 6.5
  2. 3.5
  3. 4.5
  4. 5.5
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