General Aptitude › Problems on Trains › Question #2503
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QA train running at certain speed crosses a stationary engine in 20 seconds. To find out the speed of the train. Which of the following information is necessary:

ID: #2503 Problems on Trains 3,574 views
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#2503Q ID
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Problems on TrainsTopic
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  • A Only the length of the train ✔ ✖
  • B Only the length of the engine ✔ ✖
  • C Either the length of the train of the length of the engine ✔ ✖
  • D Both the length of the train and the length of the engine. ✔ ✖
Correct Answer

Explanation

Since the sum of the lengths of the train and the length of the engine is needed, So both the lengths must be known.

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