Multiple Choice Questions on By walking at 3 4 of his usual speed a man reaches his office 20 minutes later than usual His usual ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

By walking at 3 4 of his usual speed a man reaches his office 20 minutes later than usual His usual ...........

Quantitative Aptitude ( CCS) Time & distance
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    By walking at 3/4 of his usual speed, a man reaches his office 20 minutes later than usual. His usual time is ?

    30 minutes

    Incorrect Answer

    60 minutes

    Correct Answer

    75 minutes

    Incorrect Answer

    1 hrs 30 mins

    Incorrect Answer
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    Explanation:

    Let L be the distance, V be his usual speed.
    We have L/(3/4 V) = L/V + 20. 
    So, 4/3 * L/V = L/V + 20, 
    Or 1/3 * L/V = 20,
    we get L/V = 60 (min)

    By: Sandeep Dubey
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