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    Question

    A train crosses a platform which is 300 m long

    in 35 seconds and the same train crosses a static pole in 15 seconds. Find the length and speed of the train.
    A 110m,22m/sec Correct Answer Incorrect Answer
    B 222m,23m/sec Correct Answer Incorrect Answer
    C 225m,15m/sec Correct Answer Incorrect Answer
    D 239m,21m/sec Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Sol. Let the length of the train be`x` . ⇒ `x/15 = (300+x)/35` [if gte msEquation 12]> 300+ x 35 [if !msEquation]--> [endif]--> ⇒ 35`x` = 4500 + 15`x` ⇒ 20`x` [endif]-->= 4500 ∴ [if gte msEquation 12]>x [if !msEquation]--> [endif]-->`x` = 225m ∴ Speed of the train= `(Distance)/(Time) = 225/15` [if gte msEquation 12]> Distance Time [if !msEquation]--> [endif]-->= 15m/sec.

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