Question

How many seconds are there in a week?
A. 60480
B. 604800
C. 6048000
D. 6048

Answer 1

Hint: We can determine the time in one week with the help of small conversions like conversion of weeks into days, days into hrs, hrs into minutes, and minutes into seconds. We can start the calculation by converting weeks into days and can proceed further for the correct answer.

Complete step by step answer:
As we know that the total number of days in one week is seven, so the calculation of the one week time in the form of hours is,
$\begin{array}{l}
1\;{\rm{week}} = 7\;{\rm{days}} \times \dfrac{{24\;{\rm{Hrs}}}}{{1\;{\rm{day}}}}\\
1\;{\rm{week}} = 168\;{\rm{Hrs}}
\end{array}$
Now here we obtained that there are 168 hours in one week, so now we have to determine the total number of minutes in these 168 hours.
Therefore we get,
$\begin{array}{l}
1\;{\rm{Hr}} = 60\;{\rm{min}}\\
{\rm{168}} \times {\rm{1}}\;{\rm{Hr}} = 168 \times 60\;{\rm{min}}\\
{\rm{168}}\;{\rm{Hrs}} = 10080\;{\rm{min}}
\end{array}$
As we know that there are 60seconds in one minute, so with the help of conversion of the minutes into seconds, we can get the required time in seconds.
Therefore, we get
\[\begin{array}{l}
1\;\min = 60\;{\rm{sec}}\\
10080\; \times 1\;{\rm{min}} = 10080 \times 60\;{\rm{sec}}\\
10080\;{\rm{min}} = 604800\;{\rm{sec}}
\end{array}\]
Therefore, the total number of seconds in one week is 604800 seconds and the option (B) is correct.

Note:Remember the various units of the time and the correct conversions of these various units. The various measurable units of time are weeks, days, hours, minutes, and seconds. For the measurement of time up to a large scale in one day, generally, hours are used because units like minutes and seconds give very large values.