How many seconds long is time period \(U\) if \(U\) can be no longer than a day?

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How many seconds long is time period \(U\) if \(U\) can be no longer than a day?

1) Time period U lasts from \(13{:}59{:}00\) until \(14{:}02{:}00\)

2) Time period U lasts from \(1{:}59{:}00\) pm until \(2{:}02{:}00\) pm

OA D
Source: — Data Sufficiency |