SSC Government Jobs Exams Logical Reasoning Logical Sequences

9:22::16:?

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SSC Other Question

A jogger is running at 9 kmph alongside a railway track in 240 meters ahead of the engine of a 120 meters long train . The train is running at 45 kmph in the same direction. how much time does it take for the train to pass the jogger?

Options
1) 46
2) 36
3) 18
4) 22
A and B together can do a work in 12 days. B and C together do it in 15 days. If A’s efficiency is twice that of C, then the days required for B alone to finish the work is