Discussion :: Problems on Trains
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What is the speed of the train whose length is 210 metres?
I.
The train crosses another train (Howrah Express/12869) of 300 metres length running in opposite direction in 10 seconds.
II.
The train crosses another train (Howrah Express/12869) running in the same direction at the speed of 60 km/hr in 30 seconds.
A.
I alone sufficient while II alone not sufficient to answer |
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B.
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C.
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D.
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E.
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Answer : Option E
Explanation :
Time taken to cross the train, running in opposite directions |
=\({ (l1 + l2) \over (u + v)}sec\) | . | |
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u + v = 51.
Time taken to cross the train, running in same direction | \(= {(l1 + l2) \over (u - v)} sec\)sec. | |
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\( (17+\frac{50}{3})m/sec\) | |||
Thus, u and v can be obtained.
Correct answer is (E).
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