Multiple Choice Questions on A train covered k km at 40 kmph and another 2k km at 20 kmph Find the average speed of the train in ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A train covered k km at 40 kmph and another 2k km at 20 kmph Find the average speed of the train in ...........

Quantitative Aptitude ( CCS) Time & distance
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    A train covered k km at 40 kmph and another 2k km at 20 kmph. Find the average speed of the train in covering the entire 3k km ?

    28 kmph

    Incorrect Answer

    24 kmph

    Correct Answer

    26 kmph

    Incorrect Answer

    32 kmph

    Incorrect Answer
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    Explanation:

    Total time taken = k/40 + 2k/20 hours

    = 5k/40 = k/8 hours

    Average speed = 3k/(k/8) = 24 kmph.

    Hence, option 2 is the correct answer.

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