1.

A 240m long train crosses aplatform having length of twice of the train's length in 4 sec. What is the speed of train

Answer»

  1. Question⇒   A 240m LONG train crosses aplatform having length of twice of the train's length in 4 sec. What is the speed of train.

Explanation:

  • length of the train is 240m
  • PLATFORM length is 2 times the length of the train 2*240=480
  • The train ENGINE should start at the beginning of the platform and the last coach should end at the end of the platform
  • Additionally the train has to move 240 m to cross the platform because the end coach should leave the platform
  • 480+240=720
  • Distance =720m
  • Time=4 sec
  • Velocity =distance /time
  • =720/4
  • =180m/sec
  • 18o*18/5=64.8kmph
  • the speed of the train is 648kmph


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