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    Subject

    Quantitative Aptitude

    Topic

    Speed & Distance

    Two trains from Lucknow leave for Delhi at 11 A.M. and 11:15 A.M. and travel at 152 km/h and 171 km/h respectively. How many kilometers from Lucknow will the two trains meet?

    ক)
    342 km
    খ)
    246 km
    গ)
    340 km
    ঘ)
    286 km
    ঙ)
    None of these

    Explanation

    Distance covered by first train in 15minutes. = (15/60) × 152 = 38km The train that leaves at 11 A.M. would be 38 km ahead of the other train when it starts the journey. Also, ⇒ Relative speed = (171 - 152) km/h = 19 km/h, ∴ The distance from Lucknow would be: = (38/19) × 171 = 342 km.

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