Multiple Choice Questions on A man covers a distance in three equal parts He covers first part at 5kmph 2nd part at10kmph and 3rd........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A man covers a distance in three equal parts He covers first part at 5kmph 2nd part at10kmph and 3rd...........

Quantitative Aptitude ( CCS) Time & distance
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    A man covers a distance in three equal parts. He covers first part at 5kmph, 2nd part at10kmph and 3rd part at 30kmph. Find his average speed?

    10kmph

    Correct Answer

    9kmph

    Incorrect Answer

    8kmph

    Incorrect Answer

    15kmph

    Incorrect Answer
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    Explanation:

    Solution: 
    Let X LCM of 5,10,30 =30
    Time taken in three parts
    30/5= 6hr(1)
    30/10=3hr(2)
    30/30= 1hr(3)
    Average speed = total distance/ total time
    = 30+30+30/6+3+1 = 10kmph

    By: Pranav Gupta
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