Multiple Choice Questions on A train passes by a lamp post on a platform in 7 sec and passes by the platform completely in 28 sec........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A train passes by a lamp post on a platform in 7 sec and passes by the platform completely in 28 sec...........

Quant (SSC) Problems on trains
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    A train passes by a lamp post on a platform in 7 sec. and passes by the platform completely in 28 sec. if the length of the platform is 390 m. then length of the train (in metres) is

    120

    Incorrect Answer

    130

    Correct Answer

    140

    Incorrect Answer

    150

    Incorrect Answer
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    Explanation:

    Length of Train = Length of the Platform /Diff. in Time x (Time taken to cross a lamp post)
    Length of Train = 390 /28 - 7 x (7)
    = 390 /3 = 130 m/s

    By: Amit Kumar
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