Discussion :: Problems on Trains
- A 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:
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A.
Only the length of the train
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B.
Only the length of the engine
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C.
Either the length of the train of the length of the engine
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D.
Both the length of the train and the length of the engine.
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Answer : Option D
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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