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A clock strikes once at 1 o'clock, twice at 2 o'clock and thrice at 3 o'clock, and so on. If it takes 12 seconds to strike at 5 o'clock, what is the time taken by it to strike at 10 o'clock?

[Paper II (CSAT) Analysis 2017]
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EXPLANATION

Ans (-) Time taken by the clock to strike at 5 o’clock = 12 seconds. ...
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