I think there was something missing in UPSC mathematics Paper-I question 6(d). The question is asking to find the time taken. But for that, the function needs to be integrated. The function is not integrable moreover improper. It should have been squarely inversely instead of just inverse . As the same question (with additional word squarely) has been asked twice in previous years. Please give your opinion on that and suggest mechanism for grievance redressal.