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    Question

    Ankit reaches his office 8 minutes late if he travels at

    80% of his usual speed. If distance of his office is 80 km, then find his usual time taken (in minutes) by him to reach office.
    A 24 Correct Answer Incorrect Answer
    B 18 Correct Answer Incorrect Answer
    C 32 Correct Answer Incorrect Answer
    D 48 Correct Answer Incorrect Answer

    Solution

    Let the usual speed of Ankit be 'v' km/h and usual time taken to reach office be 't' hours.So, v X t = 0.8v X [t + (8/60) ]Or, 5t = 4 X [t + (2/15) ]Or, 5t = 4t + (8/15)Or, 't' = (8/15)Therefore, required time = (8/15) X 60 = 32 minutes

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