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### Question Asked by a Student from EXXAMM.com Team

** Q 1730801712. ** A dock strikes once at `1` O'clock, twice at

`2` O'clock and thrice at `3` O'clock and so on. If it

takes `8` s to strike at `5` O'clock, then time taken by

it to strike at `10` O'clock is

**CDS 2016 **