Multiple Choice Questions on Distance between two stations A and B is 630 km A train covers the journey from A to B at 54 km per ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Distance between two stations A and B is 630 km A train covers the journey from A to B at 54 km per ...........

Quantitative Aptitude ( CCS) Average
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    Distance between two stations A and B is 630 km. A train covers the journey from A to B at 54 km per hour and returns back to A with a uniform speed of 36km per hour. Find the average speed of the train during the whole journey?

    43.2

    Correct Answer

    44

    Incorrect Answer

    46.5

    Incorrect Answer

    41

    Incorrect Answer
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    Explanation:

    Solution:
    Distance same then average=2xy/(x+y)
    =2*54*36 /(54+36)
    =2*54*36/90
    =43.2.

    By: Pranav Gupta
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